I've been listening to Stop Podcasting Yourself, and really enjoying it. It's moved into my top-tier of shows, that I listen to immediately. I like it because it's Canadian and so am I, so there is some cultural stuff in there that I don't get from the U.S. podcasts. I also like that it's got a gentle, easygoing atmosphere - it's not as shouty and vulgar as many of the L.A. comedy podcasts often are.
However, I find that often enough, when the hosts are discussing movies or just about anything cultural, they'll often get the details wrong in a way that makes me want to shout corrections into my mp3 player. And this gives me an even greater appreciation for the way Tom trolls his listeners by making these kinds of gaffes intentionally.