I think all 3 of these guys are boarder line 2nd round cut off, but if they don't get drafted...
Sasha Kaun. IMO he will be drafted, but if not he could be a strong backup center for 10 years.
Darnell Jackson. Early in the college season he was moving up the board faster than anyone, and even went into the late first round in a lot of mocks - but he kind of fell off towards the end of the season, and really took a backseat to Arthur in the tournament.
David Padgett. I think he is the next Brad Miller, great passing and a very smart player. Only problem is he has had some injury issues, but he has healed quickly from those so I could see him being picked up by someone.
Aaron Bruce from Baylor. His freshmen and sophmore years he was a lock to be drafted, but he stayed in college. He has played on his countrys team for the past 4 years I believe - they used to compare him to a Steve Nash type. Good basketball IQ, he'd be a good pickup for a young team who needs a point guard.
drew neitzel from michigan state? not sure if he's in many drafts but i can see him being getting a steve blake kind of role in the nba. leftys with a stroke can usually find a spot somewhere http://youtube.com/watch?v=msB-8XH58rk