Auburn probably wins, but I would chuckle if Missouri won, and especially if Ohio St. lost to MSU (or the ultimate miracle that Duke upsets FSU) and they play in the BCS Championship.
Not that I really want an SEC team to win the NC again, especially one that's only been an SEC team 2 seasons, but it seems like ever since they beat Georgia that everyone has been waiting for them to tank. Even I was thinking after they choked in the SC game that they'd probably end up 9-3, but they didn't.