Florida could lose to FSU, then beat Ark. That would leave me in the awful position of having to root for ND against USC. Today's OSU/UM game was awesome. BTW, the PAC 10 is overrated.
IF ND beats USC impressively, they might bump them past Michigan in the computers.
That said, I don't think Florida is losing to FSU. I think the FSU fans would agree with me too.
In this scenario , ND goes. The BCS Championship isn't awarded based on best two out of three.