In terms of big men, Gorgui Dieng of Louisville and Isaiah Austin of Baylor are two guys that can really help us in the future.
Both are VERY skinny. Dieng is a great shot blocker and has a nice jumper, so he's like Fab Melo, except he's ready to play right now.
Austin has a great offensive game, whether its in the post or his jumper. I don't know about his defense, but he has long arms, so that helps.
Dieng could play PF, but he and Austin are probably better off as centers.