I think Beanie will come back because he can enjoy more for his last season as a HB that won't be heavily depended on since Ohio State probably will move to spread type offense like in 2006.
He could make huge plays out of shotgun when they are expecting a run from Pryor or passes to Posey/Stoneburner/Thomas.
With a fresh set of offensive linemen that will be much more fired up, Beanie could succeed better than this year, IMO.
Either way, he did so much for Ohio State and he should pick the path that will make him more happier in the end. Which path would it be? We won't know until he announces, but I get the feeling that it is going to be one more year of being a Buckeye.