After a short and tumultuous tenure as CEO of the company he co-founded, Jerry Yang and Yahoo!, Inc. (NASDAQ: YHOO) announced this evening that Yang will step down as CEO as soon as a successor is found. Carl Icahn is certainly happy, as are the YHOO investors who saw Yang refuse Microsoft Corp.'s (NASDAQ: MSFT) $33/share buyout offer earlier this year. Yahoo! shares closed today below $11.

It's a forgone conclusion that Yahoo! will immediately begin searching for a new CEO. The internal list probably includes just one person -- Yahoo! President Sue Decker. She has ruled the Yahoo! kingdom alongside Yang for the last 16 months and is easily qualified for the position. She also does not seem to bear the blame for failing to consummate the proposed Microsoft merger almost 10 months ago.

This is a precarious time in Yahoo!'s future -- it needs a CEO that can unwrap Yahoo!'s magic once again and get customers -- and the market -- interested in the company again. Yahoo! still has great products and a great brand, but it has tarnish that needs to be wiped away.

Google, Inc. (NASDAQ: GOOG) has stolen any remaining thunder that Yahoo! may have once had. Now Yahoo is seen as an incredibly popular but stodgy company that just doesn't have the cutting-edge position it used to hold in the internet.

It's hard to see how a new CEO can totally re-invent the company. But anything is better for Yahoo! than where it sits now. Yang can go back to his old position as "chief Yahoo!" and rally the troops -- that is, if any of them are even loyal to him any longer.

Finally, Yahoo! Inc. (NASDAQ: YHOO) has ditched its CEO Terry Semel, according to MarketWatch. And the new CEO is Jerry Yang, a co-founder of the company. Former CFO, Susan Decker was named president, positioning her for a chance to take over the top slot.

It is beyond me why Semel held onto his job for so long. He helped stabilize Yahoo after the dot-com crash but has stumbled from one incompetent quarter to the next for years. And he has taken home some truly outrageous pay -- a total of $452 million in salary, bonus and stock-option exercises since April 2001 [subscription] -- during which time Yahoo stock has risen four-fold.

However, in the last year the disconnect between Semel's pay and Yahoo's performance became too much to take. According to the New York Times, his total 2006 pay was $107.5 million during which time Yahoo's stock fell 35%. And directors concluded Yahoo was just not catching up fast enough with Google, Inc. (NASDAQ: GOOG) so Semel had to go.

Susan Decker had been positioned to take over the company as CEO. But Yahoo's board probably decided that she was not yet ready. However, she is considered to have the inside track during the CEO search to replace Semel. So Yang's appointment could be just a temporary move that will help stabilize the company until she is ready.

Or, with the stock up 8% to $29.62 in after-hours trading, he might just sell it. It would make a nice morsel for Microsoft Corporation (NASDAQ: MSFT).

Peter Cohan is president of Peter S. Cohan & Associates, a management consulting and venture capital firm. He also teaches management at Babson College and edits The Cohan Letter. He has no financial interest in the securities mentioned in this post.

[See our live blog of the web cast in which Terry Semel discusses his resignation here.]

A few weeks ago we were buzzing about a posting in which several Yahoo! insiders and outsiders were ranked with the probability they might succeed embattled CEO Terry Semel. The scuttlebutt amongst media insiders: Yahoo! is disorganized, without a unifying personality to lead the company, weak on strategy and thinly-staffed. First among the contenders to take over Terry's job and charge forth with a new mission was CFO Susan Decker.

It seems as if the "bookies" were right. Tonight Yahoo! Inc. (NASDAQ:YHOO) got a reorganization. In the press release, the company announces it has divided itself into three sections: the Audience Group, the Advertiser & Publisher Group, and the Technology Group. What's more, COO Dan Rosensweig is leaving the company in March (he was rumored to be a rival to Decker for the CEO spot). Decker will head the Advertiser & Publisher Group (i.e. where the money is), certainly a nod toward her potential to take over the "corner cube" from Semel.

Buzz started at 4 p.m. local time: there was an internal company-wide executive level webcast. Nothing says "someone is getting fired" like "internal company-wide executive-level webcast." At least not in a web company! The response so far: "no surprise," "no surprise" that Project Panama is being set as a priority for the new Technology group (and, from the same post, "If you can't sum up a unit in 30 words maybe it's not streamlined enough"), "where is Jeff Weiner, Yahoo!'s former golden boy?" and, from an insider, why not Britney Spears as CEO? [Or, at the very least, the head of the audience group, for which a search party has been launched.]

In a move sure to take cost savings to a newly symbolic level, Yahoo! said today that Terry Semel's salary would be reduced to $1 each year throughout 2008, just like the top management at Google.

[Aside: as someone who's often been responsible for payroll, I've always wondered how these checks were processed; is it paid all at once or split up into bi-monthly amounts of four cents each? And do they withhold FICA?]

In return, Semel received 6 million stock options at an exercise price of $31.59 per share, as well as the opportunity to receive up to 1 million additional stock options each year. Semel has made $429 million in stock rewards, in addition to his $600,000 salary -- so please don't start sending him your leftover cans of garbanzo beans.