On tonight at 10 o clock pacific time (im not sure if they broadcast it differently on the east coast) on KCSM (college of san mateo jazz station) they have a good four hours or so of all free jazz, avant garde, improv, and all the other terms for it. the shows called ALL OUT with greg bridges and its a good time. and you can listen over the web. Or if your in the bay area its 91.1 FM. little plug for a damn good station.
Also frank zappas jazz from hell is well worth mentioning.
Awesome, I'm listening now. Thanks for the heads up.