Yeah, I've heard of John Valby. "Dr. Dirty" they used to call him, and I think that Scott E. from Geneseo was a fan.
Dan Bern can be offensive, too, but in a different way. He seems to have a lot of depth, and his rude stuff is more of the young, smarty pants variety. His roots are more in folk than in vaudville. I've been listening to two of his discs really a lot since picking them up, and I must say that I am completely impressed. He has a Web site as well: danbern.com.
I am quite thankful to Laura and Sweet Meat for introducing be to Bernstein. Patty, you'd like him a lot, since you know what's going on in the world.