Free Media and Bottom Up Media
The Real Public Radio Network guys are up and running at www.rprn.org.
The Open Media Network is in beta (http://www.omn.org/)
And the podcasting world is taking over. Podcasting is as close to pirate radio on the internet as anything I've seen or heard of. A local company called clickcaster (www.clickcaster.com) is developing software for this. Adam Curry's making it real with www.podshow.com and a company called Odeo (www.odeo.com) is making something as off in Silicon Valley.
There's even a station (AM) in San Fransisco that's going to do all podcasts submitted by listeners. Now THAT'S Pirate radio, with a license. They're calling them selves 'KYOURradio - Open Source Radio at: www.kyourradio.com
The world is a changing folks. A transmitter isn't even required anymore to have a voice.
Of course, it would be nice, but, no longer required.