David Cross has been doing a lot of cameo type stuff. He was on Time and Eric Awesome Show, Great Job! last year (as the pizza delivery guy) (incidentally, Bob Odenkirk from Mr. Show is quite involved with TaEASGJ). His standup stuff is hilarious, and I very much appreciated his war of words with Larry the Cable guy.
AD is the ultimate sitcom, IMO. I have a hard time believing there will ever be a better sitcom, ever. I was hoping against hope that they would get picked up by showtime or HBO, but a movie wouldn't be all bad either. I think part of what made AD great, though, was the fact that it was a sitcom. I don't know for sure if it would all transfer to a movie, but I'd like to give it a chance.
Tobias Funke: The world's first analrapist. (That's Aanalyst/Therapist for those of you who haven't seen the show)
edit: also, for those of you who haven't caught "Tim and Eric Awesome Show, Great Job!" on adult swim, and who have a very bizarre sense of humor, give it a shot.
Here's David Cross as "pizza boy" (might be offensive to people who don't like sexual humor and/or ladies in underwear)
[adult swim] | Adult Swim Video