Best Realistic VP Candidate for Barack Obama?

[Frodo]

He should pick someone who is white and moderate to shore up his weakness among white voters in general in states that he would need to win in order to beat McCain. 

As to whether that someone should be a man or a woman, a relative fresh-face or an experienced hand in Washington and abroad is entirely up to him, but whoever he picks better be at least a white centrist. 

[Frodo]

Obama choosing Hillary as his running-mate is about as likely as him choosing either Al Gore or Bill Clinton.