Open call for podcasts

So J recently gave me a Shuffle for my birthday, and I've started listening to different podcasts during the day while doing lab work. I really like NPR's Talk of the Nation as well as ESPN's PTI. I've tried a few others, but don't like them as much as the aforementioned two. Anyone else listening to podcasts? Any that you particularly like? I'm usually stuck doing cell culture work a couple of hours a day, and it helps pass the time.