Carl Icahn is reportedly tired of all this backing and forthing and slamming of doors between Yahoo and Microsoft. The billionaire investor is apparently considering whether he should attempt to "shove aside" the Yahoo board as a way of enticing Microsoft back to the table. There are reports that Icahn has been buying up Yahoo stock (50 million shares to be exact, or 3.6 percent of the company) though he's going to have to act fast as he only has until tomorrow to submit an alternate plan.

Apparently Icahn likes to play the white knight with deep pockets and "has a history of accumulating stakes in companies that have let down their shareholders with poor performances or questionable strategies."