NASM is high on my list of places I want to visit again. Maybe next year - my wife and I are considering where we want to go for our 20th anniversary. The last time I was there, I think they had the Skylab backup module (used to be in the Alabama Space and Rocket Center), Apollo-Soyuz, and a bunch of satellites.

Looking at the NASM website, it looks like they've updated the displays somewhat. It appears they have a Corona spy satellite there.

What I like the most is the main entry area with the Wright 1903 Flyer, the Spirit of St. Louis, XS-1 Glamorous Glennis, and the Apollo 11 command module. What a collection of history all in one room!

Looking at some of the website's pictures, I can tell some of the hardware that's on display. This image appears to have the Skylab on the left, a Shuttle model and 2-3 different configurations for the Shuttle when it was being developed, what appears to be a Hubble mockup and a thruster from an Apollo Service Module, perhaps part of the Apollo-Soyuz display.

Ah, here's something better. It's a clickable map of the main space gallery.