We will know who it is in 4 and 1/2 hours. From everything that I have been able to read, I hope it is Edith Clement. She looks like she could be O'Connor reincarnated, which is about the best that social liberals can hope for.
I just get the feeling that this is a setup for a big-time bait-and-switch. Bush would get a kick out of that stunt, and it would make the pick an even bigger story. (Karl who?)