POD-Casting is the internet world's form of broadcasting, is the new face for radio journalism in the technology era. A podcast, simply put, is no different than a webcast, a show that is broadcast over the web and is broken up into parts or episodes. Most podcasts are similar to news radio programs and deliver information on a regular basis, while some podcasts are comedy shows or even special music broadcasts.
http://en.wikipedia.org/wiki/Podcast Basically a recorded audio show, that is available in MP3 format and published through an RSS feed for users to download into MP3 player, car etc.
What is Podcasting Podcasting is quickly becoming a buzz word among the techie crowd. So what is podcasting, anyway? Podcasting is online audio content that is delivered via an RSS feed. Many people liken podcasting to radio on demand. However, in reality, podcasting gives far more options in terms of content and programming than radio does. In addition, with Podcasting, listeners can determine the time and the place, meaning they decide what programming they want to receive and when they want to listen to it. Listeners can retain audio archives to listen to at their leisure. While blogs have turned many bloggers into journalists, podcasting has the potential to turn podcasters into radio personalities.