I just posted this on the events page: http://www.dieselpunks.org/events/steampunk-history-beyond-imaginat...
Starting this month for the next three months, the Muzeo in Anaheim, CA is going to be hosting an exhibit called "Steampunk: History Beyond Imagination!" Their grand opening is scheduled in two weeks, on Sunday, Oct. 23rd. More info on the events page linked above and on the Facebook RSVP link off that page. It's sure to be a most amazing afternoon, do come if you're in SoCal, and do share with all your friends and social groups!
Here's their Kickstarter promo reel:
Facebook RSVP: http://www.facebook.com/event.php?eid=247601765277109