With the pending lockout, I'd highly recommend if he's not a sure 1st round pick (which by most accounts he isn't from what I've seen), he might wanna stick around. I can't imagine being a 2nd round pick this year can be a good thing when you have an option of playing another year in college. But I'm not the one making the decision, so I don't know all the factors involved. Of course, things can changes through workouts and such. All it takes is blowing away a couple teams and suddenly you're a top 20 pick cause one team likes what you offer.
Either way, I wish him the best and just hope he makes the best decision for him and his family.