Dan Balz has a lengthy rundown of Obama's VP options which includes this graf:

Clinton, of course, would be the ultimate surprise. She would be a big-league pick for Obama, and a gesture designed to unify the Democratic Party. But given all the questions and concerns about the role Bill Clinton would play during the campaign and particularly in an Obama administration, her selection still appears highly unlikely.

Fair enough. But if you scroll down Obama's list of choices, the analysis hasn't really changed: Obama with anyone other than Clinton doesn't seem to add much at all, while an Obama-Clinton "Dream Ticket" would seem to be nearly unstoppable.

Eight weeks ago Obama probably felt like he didn't need her. Eight weeks later, he probably needs her more than he's willing to admit, and certainly more than she needs him. If Obama wants to win, and if his ego will allow it, he should pick Clinton.