I think Williams will win the rookie award in the East and for the league. His only real competition is Denmark from Winnipeg. If Williams get the East nom, he'll win the award.
Medlock should get the East nom for Special Teams, but I could see that going to Sean Whyte. Medlock has been better than Whyte, so hopefully the voters will see that. He'd likely loss the league award to McCallum.
Hickman could get the nom for Defensive Player (Calvillo will get it for MOP), but he's in tough with Cox and Johnson. That was is a toss up for me. If he gets it, he could easily win the league award. Probably the toughest category to choose.
Maybe Dyakowski gets the East nom for O-Lineman because the field is not that strong. But O-Linemen awards are always difficult to judge.
Stala could also get it for Canadian, but he will be judged not by what others have done, but by his own season last year. Less receptions and yards, though more TDs, probably means the nomination goes to someone else. I don't know who that will be, but I don't think it will be him.