Some others I've enjoyed recently:
Stuff They Don't Want You To Know (Rational conspiracy entertainment from the HowStuffWorks family, I usually just listen to the audio version.)
The Todd Barry Podcast (everybody probably know all about this)
The Dana Gould Hour (well-produced, doesn't come out frequently, very funny and covers a lot of ground content-wise)
Conversations with Matt Dwyer (comedian doing interviews- but wait! He doesn't usually interview comedians!)
The Todd Glass Show (this one took me a while to appreciate, but I'm on board now)
Modern Day Philosophers with Danny Lobell (I don't know much about philosophy, like at all really, but even I cringe sometimes at the misinterpretations and weird jumps in logic in this show, but it's still very entertaining as long as you're not looking to learn anything)