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:

The departure of Dave Karnstedt, who took over last year when longtime Yahoo ad sales exec Wenda Millard left Yahoo in the first of many controversial partings, has been long rumored internally.

(In fact, I have driven one of Yahoo’s PR people crazy in recent months trying to verify a persistent tip I had been getting that he was headed out the door.)

Karnstedt will be joining Redpoint Ventures, a Silicon Valley venture firm, as an executive-in-residence.

And, in a rejiggering and addition of duties at Yahoo (YHOO), Karnstedt’s job and more is going to Joanne Bradford (pictured here), a longtime and well-known Microsoft (MSFT) exec who decamped from the software giant to helm national ad sales at trendy ad services start-up Spot Runner just six months ago.

There have been rumors swirling that Bradford was unhappy at the smaller company after working at the giant Microsoft.

She was EVP of National Marketing Services, focused on national advertisers, for Spot Runner, joining in a high-profile move in March. Previous to Spot Runner, Bradford was a VP and chief media officer of MSN Media Network, and had worked at BusinessWeek before that.

In any case, the move will be seen as a blow to Spot Runner, which recently did some unusual layoffs, despite receiving a large slug of cash from investors.

(Here is a post and video I did on a recent trip to Spot Runner, including an interview with its CEO Nick Grouf.)

“I am going back to my entrepreneurial, build-something roots,” Bradford told me at the time she joined Spot Runner. “There is such inefficiency in buying and selling of advertising and someone has to solve that, both for big companies and small ones.”

Well, welcome to Yahoo, Joanne, which could use a little efficiency in its buying and selling of ad sales!

Seriously, Bradford will now will take over as SVP of U.S. revenue and market development at Yahoo at a very dicey time.

Besides facing a withering U.S. economy, a weakened stock price after the takeover attempt by Microsoft and ensuing mess related to it, it was revealed that the Justice Department might block the deal Yahoo recently struck to outsource some of its ad sales to Google (GOOG).

Yahoo said that in this newly created role Bradford will oversee sales, market development for advertisers, small business and HotJobs. She will report to Hilary Schneider, EVP of Yahoo’s U.S unit.

Karnstedt, whom I interviewed when he first took over ad sales a little more than a year ago, is leaving to pursue other opportunities.

In Silicon Valley, that means the inevitable stop at a VC firm. Hence, Redpoint!

Interestingly, he joins former Ask.com head Jim Lanzone at Redpoint, while former Yahoo execs Jeff Weiner (Accel Partners and Benchmark Capital) and David Goldberg (Benchmark) also landed cushy EIR gigs after leaving Yahoo.

Karnstedt had been SVP of U.S. sales at Yahoo and had apparently resigned from the company earlier this summer (thanks for not confirming that when I asked so many times, Yahoo!)

With Yahoo seven years, he was charged with the difficult task of integrating Yahoo’s search, display, Blue Lithium and Right Media sales teams.

And while Karnstedt was well liked, many complained that the longtime online ad techie was not enough of a gregarious and schmoozy ad sales exec, with deep relationships on Madison Avenue, as Millard–and Bradford–surely are.

As I wrote in Aug. 2007, after an interview with him at Yahoo’s New York offices:

I made the point to Dave (he is the kind of guy you can call Dave, as you can see pictured here) that an ad guy needs to sell himself, but to no avail, so we press on in text. Nonetheless, let me set the visual scene:

Nicest guy you ever want to meet walks into nondescript room, wearing khaki-oxford-jacket Internet uniform 101. Declares Yahoo is going to kick some advertising butt in the nicest possible way. It is revealed this nice guy has been around the Web block for quite a while. Much chitter-chatter ensues. Cut to my clear-as-Fiji-water observation that nice guy, as nice as he is, has his work cut out for him.”

And now, more than ever in Yahoo’s key ad market, so does Bradford.

But, as loyal readers will find out in the weeks and months ahead, she is sure to make for a much more lively new character in our ongoing and near-obsessive coverage of the Facebook saga, which we at BoomTown HQ like to call “As the SuperPoke Turns.”

It is certainly an interesting bet for Sandberg to make the move from the powerful Google (GOOG) to the upstart Facebook. And whether she wins or loses, it will be fascinating to watch.

But fried as she was late last night when we talked after the big announcement was finally made and deserving of a break, BoomTown will bring you a sassier sit-down with Sandberg after she clears out of the Googleplex Friday after six years (wherein all her rights to unlimited visits to the organic soba latte barista and shiatsu massage therapist will be suspended tout de suite!).

So until then, here are some sizzling tidbits about Sandberg (pictured here, with those soon-to-vanish colored Google exercise balls) to chew on:

The 2007 holiday party where Sandberg met Zuckerberg for the first time was thrown by former Yahoo president and COO Dan Rosensweig, who is close to both (apparently, BoomTown’s invite, where I could have witnessed this historic meeting, was lost in the mail!). Interestingly, Rosensweig himself was someone Zuckerberg probably considered bringing into Facebook.

One plus for the socially awkward Zuckerberg is that Sandberg–who spent her formative years swimming in the shark-infested waters of Washington, D.C., as chief of staff to Treasury Secretary Larry Summers during the Clinton administration–has struck a lot of friendships around the Valley. That includes Google rival Yahoo (YHOO), where her husband David Goldberg once headed up the music efforts. Yahoo President Sue Decker is a good friend, for example.

Sandberg even seems to make nice with VCs (she has to, as her husband is now an entrepreneur-in-residence at Benchmark Partners). According to Facebook board member and major investor Jim Breyer of Accel, for example: “I met her in 2001 at the U2 Concert in San Jose. Bono called her name out in front of the whole crowd thanking her for the work she had done with Larry Summers. We (including Bono) all went out for drinks afterwards. Little did I know that it would be a 23-year-old entrepreneur who would finally allow me to recruit her.”

Ah, the sweet ironies of the Valley!

Speaking of which, here’s a video I did in June, with a longish chat with the then-pregnant Sandberg at the start, where we talk about the status of women–or lack thereof–in Silicon Valley.

The occasion was one of Sandberg’s regular gatherings, which she organizes at her home in Atherton, Calif., and which she calls “Women of Silicon Valley.” (Alternatively, BoomTown has dubbed them “ladyfests.”)

The events feature a wide range of speakers, talking to a broad swath of typically high-ranking women technology executives from Internet, software and hardware companies, as well as from other walks of life, about a range of issues. This one was with political pundit and Web diva Arianna Huffington.

Please see this disclosure related to me and Google.

Yet another departed Yahoo executive has landed at a well-known venture capital firm–this time with its former music head David Goldberg’s new stint as an entrepreneur-in-residence at Benchmark Capital. Earlier this week, Andrew Braccia, Yahoo’s vice president for consumer Web search, left the company to become a principal at Accel Partners.

The warm embrace of a plush VC office has always been an attractive option for entrepreneurs, either permanently or in the kind of deal Goldberg has, where he can ruminate on his next move in comfort. In an email he sent around yesterday, he wrote, “I will be looking at opportunities in consumer media and assisting Benchmark portfolio companies.”

Goldberg, 39, announced he was leaving Yahoo in February, but actually left this past week. He came to Yahoo six years ago, when it bought the online music site he co-founded in 1994 called Launch Media, which became Yahoo Music, one of the biggest music destinations on the Web. Goldberg and his Launch execs also started Yahoo’s subscription service two years ago.

Goldberg said he left to “get back to his entrepreneurial roots” and was excited about all the activity he sees percolating in the digital media space. “I am going to start a new company or I am going to buy one,” he said. “I have a bunch of different ideas and I want to think about them for a bit.”

He might not restrict himself to the music space this time, because he said the entire consumer media space is being impacted by digital technologies as never before. “A lot of traditional media businesses still need to be transformed … because a lot of them cannot get out of their own way even now,” said Goldberg. “But they have great assets, even if they are being underutilized, and that’s a real opportunity.”