That’s like saying “What are some good TV shows?” or “What are some good books”. It’s impossible to know which ones you’d enjoy without knowing what kind of genres you’re interested in.
I personally listen to three different Disney-related podcasts (WDW Radio, WDW Today, All About the Mouse), a Harry Potter podcast (Pottercast), Wil Wheaton’s weekly excerpt from his new Star Trek book, and John Hodgen’s minute long page-less page a day calendar.