First off, if you're a Seinfeld fan and haven't seen "Comedians in Cars Getting Coffee," you should. Especially to hear Michael Richards reveal that he's an A-grade chess player and got destroyed in under two minutes by a homeless savant on an L.A. sidewalk. I'm also happy to know what Joel Hodgson of Mystery Science Theater 3000 is up to these days.
For something you probably haven't heard, here's Geoff Garlin with a great interview of Larry David for Geoff's podcast. Larry reveals that his character in "Curb Your Enthusiasm" is "an idealized version" of himself.