This is one of my favorite podcasts, The Hook with Katie Kempner. Katie is VP of Agency Communications at Crispin Porter + Bogusky, and during her web show she interviews advertising and PR people who are both leading and covering the industries. It's a great way to hear how some of these people think and how they got to where they are. You'll also hear a lot about CP+B and what they are doing. You can find the show on the Webmaster Radio site or in iTunes.