I'm in DC right now and finally got a chance to see this yesterday at the National Geographic Museum. It was pretty cool. The props looked great and I loved the tidbits of information on behind the scenes shots. There were props from all four movies on display, as well as artwork, sketches and costumes. The rest of the exhibit displayed artifacts from archeological digs all over the world. I thought it was interesting.
The gift shop was lackluster though. Most of the stuff was just trickets like magnets, pins, notepads and pencils...and expensive! The shirt I bought was $30; the keychain was $12.
You could take photos, just no flash. I'll post some photos later on today. I'm glad I got a chance to see it. I wonder if they display different props at different locations or if its all the same from stop to stop?