I've recently discovered some great podcasts through the 'iTunes U' tab:
Music and the Brain - topics/episodes include: 'Your brain on Jazz: neural substrates of spontaneous improvisation', 'music, trance, religious experience, and the brain', 'why do listenters enjoy music that makes them weep?'.......I've only listened to one ep so far.....
LIVE from the NYPL (NY public library) -
really great variety of talks/lectures; science, literature, anthropology, the arts, politics, etc. Episodes include: 'Oliver Sacks: "Hallucinations", 'God without the sacred', 'The quest to understand consciousness in art, mind and brain'......plus a TON of one-on-one interviews with people like Werner Herzog, Keith Richards, Errol Morris, Christopher Hitchens.....
I haven't checked this one out yet, but it looks good too:
Religion and Conflict