Unbeknownst to me, the folks over at Chesterton.org have a podcast! (Sidenote: IMHO, Chesterton would be horrified at the isolationism that the Earbud Culture breeds, but, redeemingly, would likely enjoy Podcasts as smalltalk writ large.)
The Podcast is called Uncommon Sense (libsyn here) and starts with a few of the usual suspects: Dale Ahlquist, Mark Shea, etc. They have over 40 episodes now -- check 'em out.
Here are a few just to whet your appetite: