More musical chairs at Yahoo, which BoomTown predicted recently, as top execs at the company move in and out of jobs, and new ones from the outside move in.

Perhaps the most important change to occur is the replacement this week of SVP Scott Dietzen–who has been in charge of all communications and communities products at Yahoo (YHOO)–by former Adobe Systems (ADBE) exec Bryan Lamkin, several sources said.

Lamkin will become SVP of Applications Products.

According to his profile on LinkedIn, Lamkin (pictured here) was most recently SVP of Creative Solutions, Adobe’s largest business unit, where the software exec “led product strategy, marketing and product development for Adobe’s flagship software applications, including Photoshop, the Creative Suite, Dreamweaver, Flash and Illustrator.”

Lamkin, who was at Adobe for 14 years, has more recently been an executive-in-residence at two venture firms, New Enterprise Associates and Sutter Hill Ventures.

He will take over for Dietzen, who came to Yahoo in 2007 after its $350 million Zimbra open-source email acquisition

Dietzen–whom sources said is more entrepreneurial than managerial and did not want to lead such a big organization at the Internet giant–will become VP of strategy in the move. Many said they expect he will eventually leave Yahoo to try his hand at another start-up.

His colleague, Zimbra founder and CEO Satish Dharmaraj, left Yahoo earlier this year to join Redpoint Ventures as a VC.

In his job since, Dietzen has been busy fixing Yahoo’s mail and calendar offerings. (See my video interview with him below from last fall.)

But that’s not all.

Also afoot is a restructuring of Yahoo’s North American sales unit, with the unexpected promotion of Mitch Spolan, who was a regional sales exec and will now be in charge of all North American field sales.

The paidContent Web site reported the sales changes first, which have been rumored around Yahoo recently.

Spolan jumped over two more senior execs, sources said, who run sales operations for the East and West coasts. One of those execs, Beth Lawrence, will now run Yahoo’s relations with agencies. Both report to U.S. sales SVP Joanne Bradford.

Over the last 18 months, Yahoo has seen a bleeding of its advertising staff to a wide range of Silicon Valley Web companies, including, most recently, Yahoo’s VP of Sales Operations Dan Foehner to social-networking site Facebook.

Lastly, one of Yahoo’s most senior communications execs, Brad Williams, was let go as part of its recent round of layoffs. He had been running PR–admirably and with good cheer, I might add, despite all the bad news–since its head, Jill Nash, departed earlier this year.

Williams’s departure was first reported by The Wall Street Journal tonight. He came to Yahoo in early 2008 from eBay (EBAY).

New marketing head Elisa Steele, who was hired by CEO Carol Bartz, had recently hired a headhunting firm to find a new PR chief, sources said, and Williams was not considered as a candidate for the job.

UPDATE: Yahoo confirmed my report above.

A spokesman sent me the following info about Lamkin’s appointment:

Bryan Lamkin, formerly of Adobe, is joining Yahoo! as senior vice president of Applications Products, reporting directly to Ari Balogh. As a reminder, the Applications Products group consists of several key global products for Yahoo!, including Yahoo! Mail, Yahoo! Messenger, Flickr, Yahoo! Answers, Yahoo! Groups and Zimbra.

Bryan brings a wealth of experience on the consumer technology front and his background ties in nicely with Yahoo!’s ongoing focus to deliver great consumer experiences across the globe.

Bryan takes over for Scott Dietzen, who was named the interim head of Application Products following the reorg back in February. Scott will continue on at Yahoo!, and will work across Yahoo!’s Applications Products in a new product strategy role.

Bio

Bryan Lamkin

Senior Vice President, Applications Product, Yahoo!

Bryan Lamkin joins Yahoo! as the senior vice president of Applications Products. In this role, he will oversee the global strategy, development and performance for key products within the Yahoo! portfolio, including Yahoo! Mail, Yahoo! Messenger, Flickr, Yahoo! Answers, Yahoo! Groups and Zimbra.

Lamkin most recently served as senior vice president and general manager of Creative Solutions, Adobe’s largest business unit. Lamkin led product strategy, marketing and research and development for Adobe’s flagship software applications, including the Photoshop, Photoshop Elements, the Creative Suite, Dreamweaver, Flash and Illustrator.

In his 14 years at Adobe Systems, Lamkin held key management positions including Senior Vice President and General Manager, Digital Imaging and Video and Vice President of Marketing, Professional Publishing Solutions. Lamkin was responsible for product development and marketing as well as the acquisition and product integration strategies that established Adobe’s overwhelming leadership in digital imaging and video and web publishing. Before joining Adobe Systems, Lamkin served in key product marketing and international product development roles at Software Publishing Corporation and holds both a BA and MBA from the University of California at Berkeley.

And here is Dietzen in my video interview:

Yes, more layoffs are indeed coming to Yahoo, sources confirmed to BoomTown, but perhaps even more than have been reported.

But that’s not all, as even more top-level managers are either leaving or being moved around the ever-changing organizational structure at Yahoo (YHOO).

That includes a longtime top sales operations exec, Dan Foehner, who is about to start at Facebook next week, as well as others contemplating leaving, on their way out or are being reshuffled.

In other words, business as usual at the tumultuous company, whose nickname should be “Reorg.”

First, the layoffs, which the New York Times was first to report yesterday would be announced Tuesday (side note to Damon–this is how you link to scoops) during Yahoo’s first-quarter earnings call and could impact several hundred employees.

The quarterly results are expected to be weak by most analysts, which is why more layoffs–which had been mentioned by the company as a possibility–are an obvious move.

But several internal sources said Yahoo staff is bracing for employee departures that might to be even higher, as many as 500 or more.

That could mean a complete lopping off or sale of various business units that Yahoo CEO Carol Bartz has been evaluating since she arrived in January.

Why? Well, several employees said they were told the new round of cuts will not actually take place until June and that Yahoo HR is now preparing to follow the rules required by the Worker Adjustment and Retraining Notification Act.

Under the complex federal guidelines, Yahoo must provide a written WARN notice to affected employees “at least 60 calendar days in advance of covered plant closings and mass layoffs.” WARN notices are triggered for a variety of reasons, although a smaller number of layoffs across many units typically does not require it.

A WARN notice is required, for example, when an employer shuts down a facility or operating unit within a single site of employment and lays off at least 50 full-time workers, as well as when an employer lays off 500 or more full-time workers at a single site of employment.

In its last two layoffs, Yahoo issued WARN notices and slashed about 2,500 jobs in total last year, leaving it with about 13,600 employees world-wide at the end of 2008.

But some of Yahoo managers are still leaving on their own.

Many top engineers, for example, have taken jobs of late at Microsoft (MSFT) after the software giant installed a Yahoo tech star, Qi Lu, as its top online exec.

And, BoomTown reported earlier, there have also been numerous departures of key staff recently, including: PR head Jill Nash, Zimbra founder Satish Dharmaraj and soon, high-ranking techie Venkat Panchapakesan.

And more still, it seems.

Yahoo’s VP of Sales Operations Foehner, for example, is headed out after a long stint at the company and is going to Facebook, said several sources inside and outside the company.

On Foehner’s Twitter page, he tweets about a new unnamed job, as well as an athletic endeavor (Foehner is a dedicated triathlete): “back in pleasanton. starting bike adventure on thurs. start new gig on monday. 9 weeks til CdA!”

There is also a lot more movement inside Yahoo, as the reorganization done by Bartz in February shakes out.

Typical of this is Mike Walrath, the high-profile former CEO of Right Media, an online ad exchange snapped up by Yahoo for $720 million in 2007, who is now an advertising-focused SVP at Yahoo.

Now Walrath is moving out from under the purview of Yahoo North America EVP Hilary Schneider and will report to Ari Balogh, EVP of Products and CTO, as all search products seem to be rolling up through his organization. (Both Balogh and Schneider are pictured here.)

While there are other key execs at Yahoo–see this drastically downsized Yahoo management page, which used to be a lot longer–Balogh and Schneider have roughly split the company into two parts, product and engineering for Balogh and the bulk of the content and advertising businesses under Schneider.

Bartz is at the top, of course, and moving parts is not a complete surprise, said one exec, as she gets more control of the company.

“The last reorg was a blunt instrument, so now she is starting to surgically move people around or even out, after seeing what staff can and can’t do and what fat there still is,” said one exec close to the situation.

That’s no small comfort to Yahoo’s reorg-and-layoff-weary staff, especially at its Sunnyvale, Calif., HQ in the heart of Silicon Valley.

When Bartz announced her big reorganization in late February, she declared a moratorium to the endless reorganizations that had plagued the company’s troops for far too many years.

Wrote Bartz in an email to Yahoo employees about her new management lineup:

“I know you guys have reorg fatigue. Hang in there–our intention is to leave this structure in place for two to four years. We’ll continue to make adjustments as needed, but we expect this core structure to stay put.”

Perhaps the core is still solid, but a lot is still quite undefined at Yahoo, as it seeks to right its shaky fortunes.

Here’s an interesting irony–Yahoo CEO Carol Bartz will have her 99th day in office on the very one that the Internet giant will announce its first-quarter earnings: April 21, 2009 at 2 p.m. PST.

Technically, it will mean that she has been running Yahoo (YHOO) for 100 days, a time when most administrations get their first evaluation.

Thus, if it’s good enough for President Obama, it’s good enough for Bartz!

While most expect the results for the quarter to be weak, due to the econalypse, the overall verdict from BoomTown’s needling of Yahoos to give me info on their new leader recently: Love, love, love Bartz’s innate decisiveness, and wanting more of the same.

“She has an opinion and she is not afraid to use it,” joked one high-ranking Yahoo. “That is a big deal for a lot of people here who have wanted a CEO who is very forceful.”

And the only substantive negative: Some remain worried about her lack of Internet savvy, although most of those admit she has been a quick learner as the 100-day mark comes to a close.

In Yahoo’s case, 100 days has a special meaning–when he got his job in late 2007, former Yahoo CEO and co-founder Jerry Yang declared that he was going to give the troubled company a 100-day evaluation with “no sacred cows.”

The Yang-farmed bovines, as it turned out, just got fatter.

Under Bartz, more have been under the knife, as the hard-charging exec has started to really put her imprint on the company.

She has certainly talked tough since the meet-the-press conference on her very first day on Jan. 13.

Some memorable Bartz quotes were about Yahoo’s immediate needs, in her estimation: “some friggin’ breathing room” and “frankly, [the company] could use a little management.”

That kind of tough-lady, Annie-Get-Your-Gun quote-making has been Bartz’s signature, whether it be in folksy Friday memos she has sent out to staff or at the fourth-quarter earnings call in late January, only weeks into her tenure, when she declared:

“This is not a company that needs to be pulled apart and left for the chickens.”

Well, except for the management structure, which Bartz pulled right apart and reshuffled six weeks in.

Cleaning up and simplifying the complex reporting structure in an all-roads-lead-to-Carol set-up and tossing out the CFO were main points of the reorganization. Many at Yahoo expect there to be even more cuts in staff sooner than later, many sources said.

And there have also been departures of key staff, including: PR head Jill Nash, Zimbra founder Satish Dharmaraj and soon, high-ranking techie Venkat Panchapakesan.

Yang too, although he remains on the board, has not been present as much at the company.

Curiously, though, except for the new CMO, Elisa Steele–whose office is powerfully located right next to Bartz, as many Yahoos noted to me–there have been no further appointments for open positions for CFO, a new Customer Advocacy top exec and a new international head. Presumably, they are on the way.

Not that Bartz has not been busy–visiting Yahoo staff and clients all over–as well as finally finding time for a face-to-face meeting with Microsoft CEO Steve Ballmer in Silicon Valley recently.

Before the recent meetings, in a classic negotiating tactic, Bartz (pictured here) has projected a disinterested, poker-faced attitude about the situation, even telling Yahoo staff in one meeting “that she plans to spend a lot of time investigating whether to sell Yahoo’s search business, but that her ‘gut’ was not to do that.”

Well, a sale of Yahoo’s search business might not happen, Bartz was only buying a little time in being so confident and projecting the affect that Yahoo had some leverage and a choice.

But that is exactly what she does not really have, given that Yahoo faces the prospect of spiraling costs to maintain a search share, even as it has a good chance of declining.

So, last week, the news–first reported here Friday–that Bartz was involved in preliminary talks with Microsoft (MSFT) about an extensive commercial advertising and search partnership–should have come as almost no surprise.

A re-engagement between the companies, after a bruising takeover battle that ended in tears all around, has been long hoped for by investors and other observers, given that both have struggled against the search behemoth that is Google (GOOG).

(Or, in a nickname that BoomTown is trying unsuccessfully to popularize: Googzilla.)

The talks–which are not about the software giant making another acquisition offer for Yahoo–are ongoing and might not lead anywhere, but it is in both sides’ interest to avoid that outcome.

“Yahoo has to do some kind of deal or Bartz will be facing a decline even she cannot manage,” said one person close to the situation. “And Microsoft, if it wants to compete in search, needs Yahoo’s share along with its own.”

Among the surprisingly innovative ideas being bandied about: Yahoo might take over all of Microsoft’s display and premium advertising business to sell along with its own, while Microsoft would run the search advertising business for the pair.

And, while the discussions could degenerate into chest-pounding and pointless jockeying, one assumes that Bartz gets the idea that Yahoo needs a lot of help–including from some rapprochement with Microsoft, from making its staff even leaner, from streamlining its product focus and from striking other significant partnerships.

Many inside and outside Yahoo certainly hope that spirit–and not the one from this video below of a fabulous scene of Betty Hutton and Howard Keel in the musical classic, “Annie Get Your Gun,” singing “Anything You Can Do”–prevails with Microsoft in the next 100 days.

Another former Yahoo exec has landed at a Silicon Valley venture firm. This time, well-regarded serial entrepreneur Satish Dharmaraj will become a partner at Redpoint Ventures, according to sources.

The move of Dharmaraj is interesting, given that he is not starting a new company or taking a post as an entrepreneur-in-residence at the venture capital firm, as many operating execs do after leaving a company.

Dharmaraj left Yahoo (YHOO) in late January, as was reported here.

He worked there after one of the companies he founded, open-source email start-up Zimbra, was bought by the Internet giant for $350 million in late 2007.

Zimbra’s technology has been an important part of the effort to turbocharge Yahoo’s powerful communications properties as competitors like Google (GOOG) have become more aggressive.

Sources close to the situation said Dharmaraj would focus on business software, the enterprise arena and infrastructure at Redpoint.

Other former Yahoo execs who have gone to VC firms over the last year in a variety of roles include David Goldberg, Jeff Weiner (who has since become president of LinkedIn) and Andrew Braccia.

Here is a video interview I did with Dhamaraj last year after Yahoo bought Zimbra:

Jill Nash, Yahoo’s chief communications officer, has told CEO Carol Bartz and other Yahoo staff this afternoon that she is leaving the company.

Yahoo has not made Nash’s resignation official, but is likely to do so quickly as Bartz tries to stanch incessant leaks (like this one; see below!).

In any case, sources said Nash does not appear to have any definite plans to move to another company immediately, so the reasons for her departure are unclear.

BoomTown would have to guess that Nash is simply completely spent from her past two years at Yahoo (YHOO), which have been very fraught from a public relations perspective, to say the least.

Nash, who was hired by former CEO Terry Semel, has had to deal with everything from management turmoil, after Semel was replaced by co-founder Jerry Yang, to poor financial results to a nasty takeover attempt by Microsoft (MSFT) to an even less friendly proxy fight to a failed search deal with Google (GOOG) to recent wrenching layoffs.

Not much good news to report, in other words, especially with a tough turnaround road ahead with newly installed CEO Bartz, who seems to have a very strong mind of her own about public relations.

(Including, several sources tell me, this week in an internal memo, offering cash rewards to employees who turn in other employees who leak to the press. Bartz has also initiated investigations to stop leaks. All I can say about these tactics–while it might seem reasonable to try to stop the leaking, from a management perspective, and I see why Bartz is focusing on it–is: Yahoo is not a prison and its employees are not snitches and–more to the point–they won’t leak to me if Bartz fixes the company.)

While I have not always seen eye-to-eye with Nash on this column’s coverage of Yahoo, I have found her to be a pro to deal with and fair, especially considering the often tense circumstances at Yahoo in the last year.

Nash is not the first top Yahoo exec to depart since Bartz got to Yahoo in mid-January and will not likely be the last, as the new CEO carves out her own path and chooses the team she wants.

Many Yahoos have told me, not for attribution and at all levels of the company, that they are bone-tired of the long-term struggle the company has been engaged in and want to move on, even in this weak economic climate.

Last week, this column reported the departures of Zimbra co-founder Satish Dharmaraj and marketing exec Eric Hadley, neither of which was necessarily due to Bartz’s arrival.

Now it’s Nash’s turn to say goodbye. According to Yahoo’s Web site, her duties were to lead its outward-facing efforts.

It reads, in part: “As a key member of the Yahoo! executive team, Nash will be responsible for the company’s worldwide communications efforts, including public and media relations, corporate reputation, corporate, financial and employee communications, and crisis and issues management.”

Nash came to Yahoo from the Gap, where she was the VP of global corporate communications. Previous to that, she worked at Charles Schwab (SCHW), KPMG and Transamerica Life.

With Yahoo earnings expected to be dismal when the company reports fourth-quarter earnings this Tuesday afternoon, new Yahoo CEO Carol Bartz is going to have to hang tough.

And she certainly seems capable of that. At her first all-hands meeting, Bartz (pictured here) said, according to one report others have since confirmed to BoomTown, that she would “drop-kick to f***ing Mars” employees who leak to the press.

That threat sent little shivers up BoomTown’s spine too, which is why it must have taken so long for her first-week missive to Yahoo (YHOO) staff worldwide to get to my inbox.

Well played, Ms. Bartz, well played. (Plus, I really am bad at football metaphors.)

But turnabout is also fair play. And that’s why I am redoubling my efforts to bring you up-to-date news from Yahoo under Bartz’s leadership, as ATD has done so obsessively during the reigns of ex-Yahoo CEOs Terry Semel and Jerry Yang (and, if you want to really date me, Tim Koogle).

In that spirit, this column broke the news last week that Zimbra founder Satish Dharmaraj and marketing exec Eric Hadley were leaving.

And the week before that Yahoo Chairman Roy Bostock was swanning around Manhattan with Microsoft (MSFT) CEO Steve Ballmer and Time Warner (TWX) CEO Jeff Bewkes.

More to come this week, for sure, as all eyes turns to Yahoo’s financial performance (which is no fault of Bartz’s, who’s just arrived but still has to deliver the news).

But until then, here’s that energetic memo Bartz sent out to Yahoo troops after her first week there.

From: Carol Bartz
Sent: Friday, January 16, 2009 3:12 PM
To: all-worldwide@yahoo-inc.com
Subject: My First Friday

Carol

One of Yahoo’s top marketing execs, Eric Hadley, who came to the company with a lot of acclaim in only November, is set to leave for a new job working in branding and global marketing for Microsoft’s MSN online service, several sources said.

Hadley had previously worked at Microsoft (MSFT) as GM of global advertising solutions and marketing support at MSN, although he had come to Yahoo (YHOO) from a job at Heavy.com as its chief marketing officer.

At Yahoo, he was hired as its VP of U.S. field marketing. In a statement at the time of his hire, Yahoo’s marketing and customer care SVP, Nick Besbeas, said it was a “a newly created role responsible for marketing communications strategy and execution for advertisers, publishers, industry groups and other partners.”

It’s yet another sign of renewed executive unrest at Yahoo, which continues in the wake of the hiring of new CEO Carol Bartz. Yesterday, BoomTown reported that Zimbra founder Satish Dharmaraj was leaving Yahoo, which was confirmed by the company later in the day.

Hadley seemed excited by the new role at Yahoo only a few short months ago. In his statement then, he said: “I’ve always admired the Yahoo! brand, the spirit of innovation and results Yahoo! provides for advertisers. I am very excited to be joining this great team and look forward to helping take the company to the next level.”

Well, maybe not the next level, which Yahoo is trying to reach under Bartz.

The departure of both execs is not likely related directly to her arrival, as sources at Yahoo said that the hard-charging new CEO had not yet met with all its top execs to assess the bench strength at Yahoo, or brought in any new execs save her own longtime administrative assistant.

So far, many of the troops at Yahoo seem jazzed by Bartz’s arrival as it signals change and she is known for making decisions quickly.

But the uncertainty of a new CEO and continued talks with Microsoft and Time Warner (TWX) unit AOL about various partnerships have continued to jar many at Yahoo too.

The move, to be announced internally later today, is not a big surprise, even though Yahoo paid $350 million for Zimbra in the fall of 2007.

Dharmaraj (pictured here) had previously stepped back from day-to-day leadership at the Yahoo communications and communities division, which is run by former Zimbra President and CTO Scott Dietzen.

But the departure of an innovative entrepreneur like Dharmaraj–although typical when big companies buy start-ups–is never a good thing, given that it’s more important than ever to keep innovative leaders at Yahoo.

New CEO Carol Bartz will have to tap internal leadership if she hopes to turn Yahoo (YHOO) into the kind of fresh opportunity she said it could be when she was hired earlier this month.

Yahoo introduced new email services recently, based on some of Zimbra’s technologies and concepts.

That has been important, since Yahoo Mail has always been a company bright spot and has remained the bigger provider of Web email to general consumers.

But most agree that Yahoo has allowed the Google (GOOG) mail offering, Gmail, to suck up all the oxygen in the room with more flashy features like threading of conversations while not serving up a strong response quickly enough in an arena Yahoo pioneered.

Zimbra vaulted its effort at differentiation from the hyped Google offering forward more quickly.

More importantly, it has strengthened Yahoo’s ability to make online email act more like a computer program than a Web page, which has been the main focus of late of Yahoo, Google, Time Warner (TWX) online unit AOL and Windows Live Hotmail from Microsoft (MSFT).

In addition, since Zimbra was designed with flexible and open Ajax programming tools, it made it easy for third-party developers to make many other applications that jack innovation from the outside, making the communications platform the center of the Web experience with video, search and other tools.

It’s not clear where Dharmaraj is going, but here is a video interview I did with him last year after Yahoo bought Zimbra:

Former Facebook exec Owen Van Natta will take the CEO job at a music discovery site called Playlist, a move that had been speculated last week, after he did not end up taking another position as head of MySpace Music.

Van Natta’s arrival at Playlist was not the only news for the Palo Alto, Calif.-based start-up–former AOL exec Bob Pittman’s Pilot Investment Group is also investing an undisclosed amount of money in Playlist. Pittman will also join its board.

Playlist has previously raised several million dollars, said sources, but the new funding is many times that, to total about $18 to $20 million.

The move to Playlist is an interesting one for Van Natta, who has looked at a number of jobs since leaving the high-profile social-networking site earlier this year.

He has talked to a wide range of companies, sources said, including Microsoft (MSFT) and a range of start-ups, as well as with MySpace, which is owned by News Corp. (NWS). (News Corp. also owns this site).

Those talks between Van Natta and MySpace to run its new music initiative did not pan out for a variety of reasons.

But he has long expressed a desire to become a CEO of a company, rather than just head to another executive job within a larger company, so the move to run a start-up is not a surprise.

In an interview this afternoon, Van Natta told me he got very intrigued by the possibilities at Project Playlist, which was the first iteration of the start-up and in which he is an investor, due to its viral growth.

And, indeed, Playlist has grown quickly to become one of the larger music communities on the Web, claiming that more than 38 million music fans monthly, sharing playlists via its Web site and also widely distributed embeddable widgets. The site has tens of millions of daily page views, according to surveys.

To get to those big-scale numbers, Playlist essentially has offered users a giant linking service for music, not unlike Google (GOOG) with all information, pointing users to promotional, free and sometimes illegal music and music video tracks all over the Web.

Those links to illegal music have resulted in a lawsuit aimed at Playlist from the music industry, sources said, a sadly typical experience of many online music services.

The usual tactic for the music giants: Sue first and shake down later.

Under Van Natta, I would guess, Playlist is likely to reach out to music companies and strike deals.

The company also needs to settle on its main business plan, which appears to me to have been less important than its explosive growth.

Playlist currently does have some small amount of advertising on the site, and seems to be making most of its scratch from sending leads to ringtone sellers.

Van Natta did not want to reveal specific strategies for Playlist going forward, only noting the opportunity is large.

“Discovery around music is exploding on the Internet,” said Van Natta. “And the company that does the best job of taking advantage of that is really going to be huge.”

That said, there have been a lot of music-aimed efforts like Playlist in the music space, with a lot of different business plans and varying degrees of success, ranging from the Apple (AAPL) behemoth iTunes site, which sells single songs, to the CBS (CBS) music service, Last.fm, which relies more on advertising revenues.

Other contenders in the space include the Rhapsody subscription service from RealNetworks (RNWK), music discovery service iLike and many others. MySpace has also waded deeply into the music space, and Facebook is also reportedly weighing its own service.

Van Natta was one of Facebook’s earliest and most prominent execs, serving in jobs like COO and also Chief Revenue Officer while there.

He came to Facebook in the fall of 2005, after a stint as VP of Worldwide Business and Corporate Development at Amazon, and was part of the founding team of A9, the Amazon search company.

“I am excited to be building a company again,” said Van Natta, who has taken many months off since he left Facebook in February.

In its ongoing renovation of its offerings–last month it began rolling out a new homepage–Yahoo is unveiling a new online calendar, with a passel of new bells and whistles, to a small group of users worldwide.

At first, the beta–current users can register to try it here–will take place in the United States, Brazil, India, Taiwan and the United Kingdom.

Overall, it is a good-looking, simple and clean design–that will eventually be extended to all of Yahoo’s 8.1 million calendar users worldwide.

It is also Yahoo’s first attempt at leveraging and integrating technology from its $350 million acquisition of open-source email and calendaring company Zimbra just over a year ago.

And, incredibly, although Yahoo’s is the top online calendar in the world, it has been 10 years since the Internet giant updated it.

That lack of innovation has resulted in major inroads in recent years by newer entrants like Google, whose calendar launched with more modern features, like color-coding, easy sharing and drag-and-drop functionality.

With its renovation, which is based on open standards, the updated calendar from Yahoo (YHOO) now has these kinds of features and also works more seamlessly with Yahoo’s powerful email product, Yahoo! Mail, which has 278 million users.

The new Yahoo calendar is built on the Zimbra platform, which uses Ajax functionality in its online calendars and iCalendar (iCal) and CalDAV3 standards.

That makes it interoperable with other online calendar services, including those from Mozilla, Apple, Microsoft, Time Warner’s AOL and Google.

One of the cooler features is the ability to zoom-in and zoom-out from a monthly wall calendar view to a single event.

In addition, Yahoo’s new calendar can integrate pictures from its Flickr photo community and also has a “to-do” list.

As the beta is rolled out further in the coming months, Yahoo will add additional synching and event discovery features.

I talked about all this today with Yahoo SVP Scott Dietzen, who came to the company with the Zimbra acquisition and now is in charge of all communications products at Yahoo.

Here is the video interview I did with him:

And here are the screenshots of the new calendar, along with one of the old calendar, for comparison (click on images to make them larger):

The old main Yahoo calendar

The new main Yahoo calendar

The “zoom” feature

The integration with Flickr

The Upcoming.org integration

But–as many readers have requested–they will all be available in their entirety over the next weeks in this column.

Here’s Part 3 of 4 of an interview Walt Mossberg did with the Gates Foundation’s Melinda Gates.

(I will be posting one video part of the discussion with Melinda Gates every day this week through Thursday.)

As you will see, Melinda Gates is articulate in ways that are critical to the task that she and her husband–that would be Microsoft (MSFT) Founder Bill Gates–have put before themselves: Big league philanthropy with deeply effective results, specifically in health and learning.

In this video, Melinda Gates talks about the best ways to fix the broken parts of the public high school educational system in the U.S.