Cameo appearances
Director/writer Mitchell is featured in two shots in the Sex-Not-Bombs Room: the first, kissing a dark-haired man; and the second, performing cunnilingus on a woman sitting on a couch.
Jonathan Caouette, director of Tarnation, as the man who steals some "blondies" off a plate in the Sex-Not-Bombs Room. Mitchell met him when Caouette auditioned for Shortbus and subsequently became executive producer of Tarnation.
Mary Beth Peil as the woman with her hand down the storm drain (Severin takes a Polaroid of her).
Singer-songwriter Reginald Vermue (aka Gentleman Reg) has a song on the soundtrack and appears as "The Albino"
Tristan Taormino, a sex columnist and porn film director/occasional actress, is one of the participants in the orgy sequence.
Comedian Bradford Scobie (Doctor Donut)
Singer-songwriter Jasper James, who also appears on the soundtrack, has a cameo as the woman on whom Mitchell is performing oral sex (on the couch next to Rob).
Comedian/bon vivant Murray Hill (on the swing)
Acrobat-comedians The Wau Wau Sisters (on the trapeze)
Miss Exotic World 2004 Dirty Martini (doing the strip tease)
Burlesque star The World-Famous *Bob* (sitting with the Mayor in the Truth-Or-Dare Room)
Ray Rivas, like his character Shabbos goy, was known for his blood-inclusive brand of extreme performance art which he performed at DUMBA.
Bitch, of the bands Bitch and Animal and "Bitch and the Exciting Conclusion", plays herself.
Daniel Sea, queercore musician and former circus juggler of Cypher in the Snow and cast member of The L Word, plays themselves as Little Prince, their Radical Faerie nickname.
JD Samson of the band Le Tigre (who actually played their first show in DUMBA) appears in the "Bitch's Bedroom" scene.
Justin Tranter, lead singer of the band Semi Precious Weapons, is a spectator in Shortbus.