There was a full size Vader armor, cleverly placed so you walk around a corner and find him blocking your path. More than a few people got a bit startled. Unfortunately, because of this positioning, it was REALLY impossible to get a good photo. Not sure which movie thats from, but I suspect its original trilogy.
Its below, for what its worth, along with a couple of interesting ROTJ items - prototype maquettes for Jabba and a Gamorrean Guard.
There were some things definitely specific to ROTS, like the actual Utapau landscape, models of various buildings and the bronze bust heads from the Jedi temple. I'll try to dig up a few photos of those, but I might need help from someone skilled in photoshop to make them even vaguely presentable.