You might want to check out Public Radio Roadtrip an application done (in progress?) by John Tynan. It was still slightly rough around the edges the last time I tried it out but was looking really interesting and was exploring some really interesting ideas.
*Public Radio Roadtrip* GAE test site http://publicradioroadtrip.appspot.com/publicradioroadtrip Get the Code here http://code.google.com/p/publicradioroadtrip/ John's Blog http://p2pu.org/en/johntynan/ John also did an application for public radio funding campaigns...
