I've worked with Campbell, Atlanta Medical Center, and Univ of Mississippi, so I can give a little info on those.
Campbell - obviously one of the biggest name programs, awesome combination of city trauma and private practice, excellent away elective, definitely get all subspecialties well-covered.
AMC - under-recognized program, great chairman who does tons of trauma (even though it is a level 2 center, these guys are doing more than a lot of level 1's), residents get along well, lots of upside.
Mississippi - as rebelpod said, this is an awesome group of guys and the chairman is really great and involved. Tons of trauma and autonomy. Just brought in a tumor guy, so all subspecialties are going to be pretty well covered.
Aside from those 3, I don't have much info personally. For a smaller program, I've heard great things about Greenville, SC.