Where does that come from? Joe Schad is reporting that Texas et. al. are headed for the Pac 10. Not that ESPN is always right or anything--and the source goes unnamed--but it's on their front page and one of their main reporters was willing to put his name on it, which is more than we can say for most of the nonsense that's being bandied about.
http://northwestern.rivals.com/showmsg.asp?SID=901&fid=57&style=2&tid=143839427&Page=1
Everything that ESPN has reported has come from the Texas rivals site (Chip Brown, who is a mouthpiece for Texas AD Dodds).
But what most don't realize (and ESPN sure as hell isn't going to try to report) is that this whole conference realignment is a gigantic game of chess.