For reasons too long and boring to mention, I'm only just looking at this whole new-fangled podcast thing. And today I was inordinately delighted to discover the Car Talk Podcast — Click and Clack! free and without any effort on my part!
I also discovered, through iTunes, a free Cook's Illustrated video podcast (which doesn't appear to be available through their website). And behind the cut are a bunch of audiobook-like things that I'm going to try:
Any other recommendations? Note that I prefer to read my news, and don't have time to watch more than short videos (the Cook's Illustrated ones are in the five-minute vicinity). Things like audiobooks, radio plays, and other entertainment listening are best.