I have been enjoying two great podcasts about free thinking, they are both excellent, and different to each other -- I definitively recommend to subscribe to both.
Reasonable Doubts [website|rss|itunes] is a weekly radio show with 3 hosts (doubtcasters) that discuss different aspects of religion including a commentary of current events. The show, that lasts about one hour, includes interviews and sometimes recordings from talks. It is very well done and well documented, and tries to stay factual while still being quite incisive. "Reasonable Doubts...for those who won't just take things on faith."
Pat Condell's Godless Comedy [website|rss|itunes] this is a funny, ironic, and enjoyable monthly rant that says everything in 7-10 minutes. The "show" is an audio version of his youtube channel which is also available with captions on dotsub. "Hi, I'm Pat Condell. I don't respect your beliefs and I don't care if you're offended. Now that we've got the formalities out of the way, welcome to Godless Comedy"