The Big 10 has been considering expansion to add a 12th team that would allow it to add a championship game in football. Missouri has been rumored forever (I doubt it will happen), while the internet buzzed about a supposed announcement declaring Pittsburgh the winner of the Big 10 Entry Sweepstakes. Neither situation has panned out yet.
However, Tom Keegan at the Lawrence Journal World is reporting that Texas and the Big 10 are talking.
In addition, the Pac 10 has also apparently gotten in on the expansion talk. The hot rumor right now is that Colorado and Utah are the most-likely candidates to join the Pac 10. Here's a link to the Wiz of Odds that has a bunch of other links on this particular expansion talk.
Update: I see Frank the Tank also has a post up about the Big 10 and Texas.