Welcome BoardinBob!
That track doesn't have a name yet, as far as i know. It's presumably a little loop of something that Rick and karl have been playing with, since i find it hard to believe they'd advertise their recent radioshow with someone else's music. Feel free to give it a name, though! Folks around here are often suggesting names for improvized tracks.
oh, and if you can't get enough of that track, the movie and soundfile were kindly uploaded by Stimpee...link's on first page of this:
http://www.dirty.org/forums/showthread.php?t=3389