Dave Chappelle, the favorite test case of armchair psychiatrists everywhere, will be appearing on Late Night with Conan O'Brien on May 10. NBC apparently just released the guest list for four episodes to be shot exclusively in Chicago at the Chicago Theater, and Dave is on the list. Not a huge surprise, since he's been on Conan's show countless times before. Common, a Chicago hip hop artist, will appear on the same episode. Others set to appear on the show while it's in the Windy City are the band Wilco and Sean Hayes from Will and Grace. It should also be noted that while the guest list has been released by the network, it's always subject to change. I just hope we get to see "funny" Dave and not "confessional" Dave. I already got enough of that when he was on Oprah.