Here's what it would take:
The Big Ten would have to have two BCS teams. We'd have to beat Iowa. Illinois would have to beat Northwestern. Cal Poly would have to beat Wisconsin or else the Champs Bowl would have to choose us over Wisconsin. If both us and Wisconsin win Saturday, they'd be 7-5 and we'd be 8-4. However, a bowl can choose a team with one fewer victory (as long as they are better than 6-6).
I have heard, and have had it corroborated by some Wiscy fans, that Wisconsin would prefer to be dropped to the Insight Bowl rather than playing in Champs becuase they've played bowl games in Central Florida the past 4 consecutive years.
Having said all that, I still think we wind up in Pheonix.