Visited the Paley Center for Media in Beverly Hills last Friday. Two rooms on the second floor are filled with costumes, wardrobe, props, and set pieces as part of "Television Out of the Box, an Exhibit by Warner Bros." scheduled to run till 2015.
Of note to RPF members are Justice League costumes from Smallville and wardrobe from Babylon 5, Supernatural, and The Vampire Diaries.
Here's a link to the photos I took:
Paley Center Warner Bros. Exhibit - a set on Flickr
If anyone has questions about what shows are represented, you can ask me in this thread. I also joined the Paley Center so I can return for only $5 if anyone has "special requests."