Assuming that Bama and Florida meet in the SEC championship game with no more losses, it looks like the best possible bowl for us is the Capital One Bowl, assuming we finish the regular season 10-2. This bowl usually pits the best available SEC team against the best available Big 10 team. I expect both Florida and Alabama to get BCS bowls. I also expect Penn State and the Ohio State University to both get BCS bowls (PSU to the national championship game, tOSU to the Rose to face USC).
So, it looks like Michigan State is our most likely bowl oppenent at this point.
Of course, Michigan State could beat Penn State, which would drop Penn State to the Rose Bowl and then Ohio State wouldn't get an at-large bid and they'd drop to Capital One.
That's a matchup I wouldn't mind seeing...Georgia vs tOSU.