"The One True Podcast"
http://www.irreligiosophy.com/If anyone DOESN'T listen to these guys, you need to do so IMMEDIATELY. It's the ONLY atheist podcast I've ever found that is actually educational; shows like DFA are fine, but they tend to be "let's read the news and talk about it." Irreligiosophy actually researches certain aspects of different faiths and denominations, and discusses the facets of religion from a historical and philosophical basis. And they do so while being hilarious assholes. Both hosts are ex-mormons, and they give a ton of info on that religion. They've covered Islam, Hunduism, and Jehovah's Witnesses in detail as well
Word for the delicate. They are very, VERY not-PC.
Anyway, this is my new favorite podcast, better than SGU (which IMO has gotten stale lately)