After watching the USC/Notre Dame game last week, I thought OSU/USC matchup would be a good one. Plus there is some old Rose Bowl rivalry history to go along with such a game.
Assuming Florida wins the SEC championship game and USC loses to UCLA, Florida could be said to deserve a shot.
Who deserves to go? That is a tough question. Michigan's only loss is to the Buckeyes. Florida and USC both lost to lesser teams. You could also say that Michigan had their shot, and that USC or Florida deserve a shot at OSU. I fail to see how Michigan would be eliminated from a playoff system though since they will finish 4th at worst in the polls/BCS. Florida is perhaps more deserving considering the tougher schedule they had than USC.
Florida is the least interesting matchup national TV/rivalry wise, and I don't think Chris Leak can hang with the Buckeyes. A USC matchup has a broader national appeal than either Fla. or Michigan. It'll likely be USC. If the Buckeyes win, Florida will have the biggest grievance. That said, what Buckeye fan wouldn't want to beat Michigan twice in the same year?