According to Wikipedia a podcast is an episodic series of spoken word digital audio files that a user can download to a personal device for easy listening. Streaming applications and podcasting services provide a convenient, integrated way to manage a personal consumption queue across many podcast sources and playback devices.
According to http://www.wired.com podcasts may the new radio, but listening to these downloadable shows requires more effort than just twisting a dial. The rewards, however, are much richer: the latest in politics and culture, interviews with your favorite celebrities, serial dramas, and comedy aplenty. All of this programming is available for free; just install an app on your phone and download the shows you want to hear.
My personal podcast can be found at http://www.anchor.fm/steveholder . It is called Holding On With Holder. I interview interesting people to discuss interesting topics. It is also on several other platforms.
Steve Holder 