Since all the state quarters have been released, I don't really check my quarters anymore. However, the other day, I checked one, and happened to notice that it was a District of Columbia quarter. I figured they were just tacking that one onto the end, but then today I got a fucking Guam quarter. When I got home and my power came back, I got on the internet and found that they're now doing U.S. Territory quarters.
Wikipedia has the skinny.