This looks like a really interesting podcast to subscribe to: Across the Sound. From the description:

Each week marketing gurus Joseph Jaffe and Steve Rubel discuss the world of new marketing, media and PR on the Across the Sound podcast. Please subscribe to our podcast using the podcatcher of your choice.

I’ll be checking it out…though I don’t have a “podcatcher of choice”. I just download, manually stick it on my player, and listen.