I finally got to see Atlantis last Friday. I won't post pictures because so many have posted great ones already. They did a fantastic job with the exhibit. The only thing I wish they would have done was provided a very high viewing platform so that you could get up high enough to see over the payload bay and see the starboard wing top side.
A very minor criticism of the pre-show is that I think that they should have kept the clips to STS-1 and then only Atlantis footage in the second room. There was a lot of "Endeavour" audio/video in there.