On Bulls.com they've posted the Summer League roster. You'll need acrobat to view it though. There arent any fun non-roster invitees like I expected, except former Laker Sumali Samake, who I believe was suspended earlier this season for steroid use. The actual players who have a shot at making the team:

Rookies: Kirk Hinrich, Mario Austin and Tommy Smith "Vets": Bagaric, Mason, Hassell, Baxter

I suppose Austin and Baxter will compete for a roster spot, and I assume Austin will have to severly outplay Lonny to get that spot. Smith is a definite longshot, while Hinrich, Bags and Mason are locks for the team. The wildcard is Hassell, who's job appears to be in jeopardy because of possible free agent signings (as i described in the post earlier)