I've tried to avoid mentioining specific podcasts unless they're really relevant to the topic. I'm not adverse to giving out publicity, but there are so many shows out there that mentioning the shows I listen to becomes a very slippery slope and threatens that every second post becomes a "check out this show!" type of thing.
However, there are a handful of podcasts out there that are truly relevant. One such show is Podcast 411.
The basic premise of Podcast 411 is to interview other podcasters and hear what they've learned along the way. It's usually a vibrant show because Rob talks to everyone, not just business podcasters. It's surprising what you can learn from car, comedy, communicators, and Canadians!