Michael Bloomberg told HDNet journalist Dan Rather that he is not running for president. He went so far as to admit he is unelectable. Of course, if you are familiar with politics in America, that immediately led to speculation that he is in fact getting ready to jump into the race as an independent next year, bringing his own personal warchest of up to 1B with him.
RBR observation: Third party candidacies are notorious for purloining votes from one or the other mainstream party candidate, but a Bloomberg effect may perhaps be difficult to gauge in advance, since he has stints with both the Democratic and then the Republican parties on his resume. He recently withdrew from the latter party and declared himself an independent, one of the moves which led to widespread speculation about his third-party candidacy in the first place.