Yahoo

Yahoo's embattled co-founder Jerry Yang is off the board, but for disgruntled investor Third Point LLC, that's not good enough. The hedge fund with a 5.2% stake in Yahoo wants to take down Chairman Roy Bostock and potentially three other directors.

It'll be an interesting week in the news of the new: Yahoo has a fresh CEO, auto shows and the CES will show off the latest in cars and tech, and a major homebuilder will tell us how new construction is doing. (Oh, and JP Morgan will give us a clue about how the banks are faring.)

Shares of Yahoo have been on a white-knuckled roller-coaster ride since the company hired an investment banker to explore shareholder-juicing possibilities, including an outright sale. Reuters has claimed that Microsoft is considering another run at its search partner, but Bloomberg dissents. Who else might buy the dot-com giant?

Carol Bartz was CEO of Yahoo! until yesterday, when she was unceremoniously fired. During her three year-tenure, Bartz pushed the stock price up 6.6%. Now the online giant's shares have moved roughly the same amount on news of her departure. But the market didn't send shares of Yahoo! higher because Bartz is gone, but rather because of what may come next.

Internet company Yahoo announced late Tuesday that it had fired Carol Bartz as CEO. After more than two years of financial lethargy, investors became convinced that she couldn't steer Yahoo to a long-promised turnaround.

YouTube has been a powerhouse in the online video arena since well before Google bought it. YouTube dominates the sector, accounting for nearly four out of 10 online video viewing sessions in the U.S. in May. What's still a question is how much the video-sharing site will add to Google profits.

Alibaba Group CEO Jack Ma told the the AllThingsD D9 conference that Yahoo should be broken into pieces. Ma may be in the midst of a beef with the search company, which holds a major stake in his firm, but despite the idea's source, a break-up could make sense financially.

For investors in search of good news, here's a quick rundown of some of the most promising developments in the market this week.

Yahoo, which holds roughly 40% of Alibaba's Chinese parent, Alibaba Group Holding, had been pining for an IPO of the e-commerce giant's sister company, Taobao. Now, though, with a fraud probe underway, Yahoo's chances of cashing in on an IPO just got slimmer.

Microsoft has definitively denied that its Bing search engine takes its cues from its rival. Nonetheless, the Google allegations highlights the challenges Microsoft faces in addressing the "long tail" market in search, or the obscure searches that collectively account for a huge portion of search traffic.