The Castro podcast player app is currently half price, according to TapSmart. Interesting UX - it deliberately eschews the download model, and instead you pick and choose which episodes you want to listen to based on the show notes.
Interview with June and Deron from the Masters of Scale podcast. "We wondered what might happen to an ideas program if it were set to an original score, the way an independent documentary might be. Why shouldn’t an audio program surprise and delight you?" - notably, the show also commits to a 50/50 gender split for guests.