Big12 isn't going to get 2 in the the BCS unless Southern Miss beats Houston. Bama is rolling. Oregon is rolling. Even with a Stanford loss they aren't dropping out of the top 14. An LSU loss next week isn't dropping them out of the top 2.
The at-large pool for 2 spots will be:
Boise State
Michigan
Kansas State
Stanford
Oklahoma or Oklahoma State or Baylor (it doesn't really matter)
The first at-large to the Sugar is Michigan, the 2nd at-large to the Fiesta isn't going to be a Big12 team to play a rematch. Stanford can loses tonight and still get that spot.