Dan Quayle, George Bush, Al Gore, etc. all disagree that it'll be Romney - perhaps not personally, but the whole concept of having someone on the bottom of the ticket that a lot of delusional conservatives would rather have at the top of the ticket is something that just doesn't happen. You don't have a VP people would rather have as president. Romney might find himself in an administration position, but he's not going to be VP.
I'd much rather have Fred Thompson on the bottom of the ticket, but I'm not going to get what I want. Marsha Blackburn would be an excellent choice for John, and probably the inside source is floating her, not that she's actually on the short list. Considering the silence from Tommy Thompson, yet the minor drumbeat of stories about Tommy Thompson, I suspect the former HHS secretary and former governor of Wisconsin is on the short list.
I'm not a big one on choosing people because of their gender or race, but pretty sure that there's some great candidates out there who would fill several big 'firsts' in the VP's office.
“You don’t have a VP people would rather have as president.”
Perhaps you do when the fossil at the top of the ticket is talking up his recent cancer scare.