It's a two-point spread, according to Sagarin.
I don't bet but I find Sagarin's "predictor" numbers interesting. He has an analysis he calls his "strong recent" predictor. That says tOSU should be favored by two. Personally, that makes more sense to me than what the Vegas bookies are saying....
Link: http://sagarin.com/sports/cfsend.htm#Predictions_with_Totals_and_Moneylines