I've loaded my mp3 player with more podcasts than I could possibly listen to on my walk, but I just had to add the next-to-latest
Skeptic's Guide To The Universe to the list. I'm way behind on listening to podcasts, but it's irresistable to listen to an atheistic podcast on Sunday. :)
Skeptic's Guide is primarily a science podcast. Some interesting stuff, but some goes over my head, too. They also discuss logic, oftentimes Christian and zodiac mis-logic. It's interesting how a lot of the stuff said by Christians is stuff they teach you to dismiss in Speech & Debate.