So I listen to a couple different podcasts. The two that I alternate between are Order 66 on d20 Radio, and Critical Hit from Major Spoilers. I used to listen to d20 Radio’s Radio Free Hommlet, but they stopped broadcasting when Essentials came out (I really really liked that show too). I’ve also tried Critical Hits and Threat Detected.
These podcasts have really made my commute to and from work fly by! I don’t even notice any driving stress, which is awesome. And it lets me avoid ads!