According to numerous sources inside and outside the company BoomTown has spoken to this week, board Chairman Roy Bostock (pictured here) has been asserting a new CEO will be named by the new year.

Only 28 more shopping days left until management clarity!

Well, maybe not so much.

Why?

Because there’s actually no “official” search committee that has been appointed by Yahoo’s board, sources said.

Instead, an informal group–with Bostock and board member Gary Wilson at the lead, with help from all the rest of the board–is conducting the effort jointly, along with exec search firm Heidrick & Struggles.

It’s almost like a Berkeley collective!

The board, though, has apparently made a list of six–I have no idea why that is the number chosen–clear criteria for the new leader of Yahoo (YHOO).

The first is that the candidate have “extensive” experience as the CEO of a public company. Another calls for media and advertising expertise. And mergers and acquisitions experience. Also strategic skills.

That’s a tall order, of course, to deliver on in such a short time.

In addition, the idea of bringing in at the same time a No. 1 and No. 2 exec has been considered, with one stronger in media and the other in product and technology.

It is hard to find an exec with skills in both, even in the best of situations.

Think pairing someone like News Corp. (NWS) COO Peter Chernin with Google (GOOG) exec Tim Armstrong or DoubleClick exec David Rosenblatt with, say, Yahoo CTO Ari Balogh and you get the concept.

But many who have spoken to board members at Yahoo said they get the distinct impression that they are leaning toward one of their own–former Nextel head John Chapple, former media exec Frank Biondi, Jr. or former Microsoft (MSFT) exec Maggie Wilderotter (pictured here).

That is due to wanting someone who has operational skills, but also can get things moving at Yahoo, while also being able to continue to work with Yang.

He will remain on the board and regain his title of Chief Yahoo. Sources said Bostock and other board members believe that Yang remains an important and beloved figure at Yahoo among the rank and file and needs to remain involved going forward.

Another key reason for wanting to pick an insider is that Bostock has also intimated that Yahoo was ready to do a deal at any time in the next week or so to merge with AOL–with or without a new CEO in place.

Consummating that might irk an outside candidate, who would have to manage the complex merger without input into its making, rather than a board member, who has been involved.

Talks between Yahoo and AOL have been never-ending and due diligence extensive, as this column has previously reported, although slower of late, because of the uncertainty around Yahoo leadership.

And the price–or, more specifically, the percentage–Yahoo has been willing to fork over to AOL owner Time Warner (TWX) has been the key sticking point, especially as Yahoo’s stock has waned in price.

Yahoo has long wanted to give Time Warner about 20 percent of the merged company, while Time Warner has wanted one-third. At current prices, that’s about $3 billion in value versus $5 billion.

But, if such a deal could finally be struck, it might be a dramatic and apt swan song move for Yang (pictured here), which could inject a bit of excitement into the mostly lackluster situation for both Yahoo and AOL.

Yang and others at Yahoo have also long felt that the company would have more leverage with Microsoft if it also controlled AOL–when and if it formally restarts its talks with the software giant about some sort of search deal.

Interestingly, many close to the situation said that there is still resistance among the “old guard” of the Yahoo board to doing a search deal at all.

New board member and activist shareholder Carl Icahn has loudly called for such a partnership with Microsoft.

But there is still extensive internal debate about whether it is wise to decouple search from Yahoo, many sources said, even if it brings in massive guaranteed revenues and allows Yahoo to cut costs in its engineering ranks.

Said one person close to the situation: “A lot of what has been going on is the board trying to figure out what kind of company does Yahoo aspire to be. That determines the type of person they bring in.”

The troubled meeting that took place last Tuesday in Los Angeles between Capital Research Global Investors’ Crawford (pictured here) and Yang–accompanied by three Yahoo board members–could be seen as a portent of what is to come at the company’s annual meeting on August 1.

And those signs are definitely not good for Yahoo’s current leaders.

At the meeting, according to several sources with knowledge of the encounter, Yang–as well as Yahoo Chairman Roy Bostock and board members Ron Burkle and Gary Wilson–strongly defended their actions thus far.

That included claiming Yahoo’s recent management reorganization was sound–despite internal unrest over it–and calling top execs who have recently left the company “MBA types,” even though several were key tech leaders.

Yang also underscored his opinion that Yahoo needed to keep its online ad search business intact with its display business, rather than sell it off to Microsoft (MSFT), although he noted the company was open to all proposals.

But Crawford and his top analysts aggressively questioned Yang’s assertions and pressed him on Yahoo’s strategy going forward.

And they indicated they had lost patience, as Yahoo shares have drifted downward in the wake of the collapse of Microsoft’s takeover attempt.

Microsoft had offered $31 a share for Yahoo and dangled a $33 price for the company, whose stock has been trading lately in the low $20s.

According to sources, Crawford told the Yahoo contingent that he was considering backing Icahn’s new board slate–although he has not yet firmly committed to it–if the company did not engage with Microsoft over some sort of deal or find a suitable alternative.

Crawford’s Capital Research Global Investors fund–one of two separately managed at Capital Research & Management–owns 6.5 percent of Yahoo, according to recent filings. Capital World Investors, which is not run by Crawford, owns 9.8 percent.

Abandonment by Crawford, an influential investor who has become increasingly and publicly disdainful of Yang and its board, means the unlikely chance that Icahn could topple Yahoo’s board and make good on his promise to throw the Yahoo co-founder out becomes a much more distinct possibility.

Of course, that got another boost today with a classic wrestling double-body slam that Icahn and Microsoft CEO Steve Ballmer perpetrated on Yang today by unveiling their own dysfunctional love match–united in hatred of current Yahoo leadership.

The move was a little sneaky and a lot crude–and mostly served to unveil just how much Microsoft dissembles about its shifting interest and non-interest in Yahoo.

But it was still an effective blow.

Wrote Icahn in an open letter to Yahoo shareholders:

“Steve made it clear to me that if a new board were elected, he would be interested in discussing a major transaction with Yahoo!, such as either a transaction to purchase the ‘Search’ function with large financial guarantees or, in the alternative, purchasing the whole company.”

Like Tweedledee to Tweedledum, Microsoft quickly followed up with its own clearly coordinated statement:

“We confirm, however, that after the shareholder election Microsoft would be interested in discussing with a new board a major transaction with Yahoo!, such as either a transaction to purchase the ‘Search’ function with large financial guarantees or, in the alternative, purchasing the whole company.”

It is a union weary Yahoo investors like Crawford might welcome.

“I never though Carl [Icahn] would really prevail,” said one Yahoo source last week. “But losing the support of a major investor like Crawford would create a very slippery slope.”

Indeed, as the stock situation has deteriorated, investors have been pressuring Yahoo and also Microsoft for weeks to engage in new talks about a sweeping search and investment deal and perhaps more.

While Microsoft has been considering a sweetened bid, it was irked by Yahoo’s recent filing that called the software giant “unresponsive and inconsistent” in its intentions toward buying Yahoo.

Yahoo has clearly been trying to make the case that Microsoft had never intended to actually buy the company.

In its own statement about the Icahn-Microsoft lovefest, Yahoo said: “If Microsoft and Mr. Ballmer really want to purchase Yahoo!, we again invite them to make a proposal immediately.”

Well, as it turned out today, Microsoft doesn’t intend to buy Yahoo now–at least from Yang.

Said Microsoft in its statement today:

“Despite working since January 31 of this year, as well as in the early part of last year, we have never been able to reach an agreement in a timely way on acceptable terms with the current management and Board of Directors at Yahoo!. We have concluded that we cannot reach an agreement with them.”

Icahn is another story, of course. For now.

First stop, obviously, is Yahoo, which reports its fourth quarter and also full-year earnings (and also perhaps some board-approved layoffs) tomorrow after the markets close.

With everything from consistently persistent takeover rumors, a still-lagging stock price and continued scrutiny on its moves to revive itself, the company’s managers and–it must be assumed–its directors obviously face challenges in the year ahead.

They certainly seem to be a pretty experienced group, with just the right kind of expertise in retail, telecommunications, engineering and entertainment.

Curiously, with all the noise around Yahoo, this has been a circumspect bunch and it’s not clear how much influence this group is exerting over management or how willing it is to roll up its sleeves and get into it.

Still, board members are supposed to be where the buck actually does stop, so, as a BoomTown public service, here’s a little primer of who’s who on the Yahoo BOD, so you know who is actually in charge (and, of course, who is to blame):

First among equals is obviously Yahoo CEO and Co-Founder Jerry Yang, who needs no introduction. Born in Taiwan and raised in San Jose, Calif., he has been trying to bring back the company he founded with David Filo since taking over the top slot at Yahoo last June. The obviously iconic figure within the company, he occupies the hottest seat of all. Some think his leadership has not been nearly bold enough, while others think his steadier approach to Yahoo’s revival is just what the company has needed.

Terry Semel served as Yahoo CEO from 2001 to 2007. After he left that job when the company’s troubles became more pronounced (to be fair, Semel did do a great job getting Yahoo back from its last brink when the first bubble popped), the former Hollywood mogul kept his title as chairman. He is also on the board of Polo Ralph Lauren, as well as many arts and cultural organizations. Recently, Semel revived his Los Angeles-based new media investment firm, Windsor Media, and rumors abound to his intentions–including possibly making a play for a Hollywood studio. Big question: Will Semel continue as chairman of Yahoo in 2008?

What to make of Roy Bostock, who has been on Yahoo’s board since 2003? I’ll tell you what: If Semel were to step down as chairman, the chatter is that the former top-level advertising exec (chairman and chief executive officer of D’Arcy Masius Benton & Bowles) is best suited to the job, given the importance of Yahoo’s ad business. Bostock also serves now has chairman of Northwest Airlines and is on the board of Morgan Stanley and is a principal at Sealedge Investments LLC.

Ron Burkle, founder and managing partner of the Yucaipa Companies, a private investment firm, has been a director since 2001. The high-profile Burkle, of course, is better known for being best billionaire buddy of Bill Clinton (and big fundraiser for Hillary Clinton). He is a curious choice to be on the board, although he is said to add an interesting perspective and also has obvious experience in retail and distribution (largely in the supermarket industry). He is also on the boards of Occidental Petroleum and KB Home.

Vyomesh Joshi joined the Yahoo board in 2005. He probably brings a good consumer product perspective to the company from his perch as executive vice president of the Imaging and Printing Group at Hewlett Packard, a $26 billion business with an operating profit of $3.8 billion, which is a whole lot of the kind of ink Yahoo needs. The longtime HP exec also has responsibilities in the entertainment arena for HP, which should be a boon to Yahoo.

The same goes for Robert Kotick, the chairman and CEO of games maker Activision, which recently merged with Vivendi’s Blizzard Entertainment unit, to create one of the biggest gaming companies in the world. Yahoo could use a little Guitar Hero buzz that Kotick’s company has gotten from the third version of the popular interactive game, a big holiday success, and also Blizzard’s World of Warcraft.

The other Northwest Airlines link is its Chairman Emeritus Gary Wilson, who has been on the Yahoo board since 2001. Wilson, who is also on the board of CB Richard Ellis, has an extensive financial background, working as the top numbers guys at places like Walt Disney (where he was a longtime board member) and Marriott. But can he lend his expertise to make the numbers work better at Yahoo?

The only woman director, Maggie Wilderotter, joined last July and serves as the chairman and CEO of Citizens Communications, which is an independent provider of telecommunications services. That background is important for Yahoo, but perhaps more important is her experience as a SVP at Microsoft (rumored to be the main company interested in acquiring Yahoo). Wilderotter has also been president and CEO of Wink Communications and has held a number of jobs at AT&T, and serves on the board of Xerox and the Tribune Company.

Eric Hippeau, managing partner at Softbank Capital Partners, is one of the two granddaddy Yahoo board members (along with Arthur Kern), having served as a director since 1996. Before Softbank, he was chairman and CEO of Ziff-Davis in its heyday. Hippeau is also on the board of Starwood Hotels and Resorts Worldwide.

Arthur Kern has also been on the Yahoo board since 1996. Kern made his fortune selling off American Media, an owner of radio stations, which he co-founded and ran. Kern now invests in marketing and media companies. (BoomTown, with great regret, has never met him after all these years–lazy, lazy BoomTown! And everyone says how nice he is. Lunch, Arthur?)

Ed Kozel, the CEO of the start-up Skyrider (a P2P search engine), is perhaps the most experienced technologist on Yahoo’s board and another key member of the board, say many, where he has served since 2000. He’s been a VC (Open Range Ventures), a consultant (Integrated Finance) and also was a longtime Cisco exec (he was CTO and SVP of business development there) and board member. He’s also been on the board of Reuters and is a director for Network Appliance.