After watching Mitt take care of Couric and Wolfie at the convention, my money is on him. He did a terrific job and I have a whole new respect for Mitt today.
My guess is Romney, too.
Reported on F&F this a.m. that Mitt hasn't talked to McCain recently. Either its not him, or McCain doesn't want any advance leaks.
As with Biden, look for the presence of Secret Service agents at the location of the VP nominee shortly before the announcement. Thursday night will be exciting, and not for the anointing of "The One."