a few thoughts...
Boise St. is a very good team, but let's be honest, they are a 3 or 4 loss team in the Big 10 or the SEC, 2-3 losses in the Pac 10 or ACC - minimum.
Oklahoma is an average team with one great player - Bob Stoops should be the coach peope are picking on, not Lloyd Carr. Yes, he's lost to OSU 3 out of the last 4 games, but those OSU teams are some of the best OSU teams they have ever fielded - how many players from last year's team are in the NFL now, and how good is this year's OSU team? He lost a Rose Bowl to Vince Young's Texas team that was a very close game, he's a good recruiter, and for the most part UM's players stay out of trouble. If that gets him fired, then there is something wrong with college football. UM will be a top 5 team at the start of next season, even with a few early departures expected.
IF OSU loses to Florida, then my final rankings would be Florida 1, OSU 2, LSU 3, Boise St 4, Wisconsin 5, USC 6 (assuming LSU blasts ND like they should)