Meet The Clandestine Insurgent Rebel Clown Army, apparently quite proud of their J20 "victory," as part of Reclaim the streets! Hard to see Matthew Yglesias taking part. Not to sound as cynical as Richard Rorty, of course, silent blogger extraordinaire. Incidentally, the link to Left2Right will return when he posts something there, though I'm beginning to have my doubts. The Clown Army folks also have a homepage here.
Update: See Metafilter's post on Coulrophobia (fear of clowns).