Podcasting trumps terrestrial radio for audio distribution worldwide. It’s happening in a few places in the podcast world. Here’s the few I could find, that are currently active:
http://boredagainchristian.com The Bored Again Christian podcast
http://www.jtindie.com JT’s Indie Christian Music Podcast
http://www.newreleasetuesday.com/wordpress/ New Christian Music Podcast from New Release Tuesday
http://buildthechurch.blogspot.com Build the Church podcast
http://web.me.com/carameltruffles/The_New_Christian_Tunes_Podcast/Home.html The New Christian Tunes podcast
By the way, what counts as a podcast? It could be audio and/or video episodes, and it should have a Podcast feed or RSS feed, so that iTunes or a “podcast catcher” would automatically download new podcast episodes when subscribed to.
Posting an audio file on a web page for play on-demand is erroneously called a podcast by some people. Don’t be one of those people.