Newsweek's Howard Fineman is the latest to predict:

Barring a big surprise or last-minute change of heart, the choice is likely to be Sen. Joe Biden of Deleware, chairman of the Foreign Relations Committee.

Sigh.  While Biden didn't make the ObamaFest VP shortlist, we get why Obama might pick the long-winded Delaweenie as a running mate.  Senator Obama has been on the national scene for a short time.  He doesn't have a ton of buddies.  At least he's acquainted with his Senate colleagues.  It's like your first quarter in the dorms when you eat every meal with the guys on your hall.