In the spirit of defying those who attempt to limit free speech, the radio show On Point broadcasted a special hour-long segment about Internet Censorship and Surveillance last Friday. Featured guests include Ron Deibert of the Open Net Initiative, Tim Wu of Columbia Law School, Julien Pain of Reporters Without Borders and Declan McCullah of CNet.

You can search for whatever you like, but type in “democracy” in China’s blogosphere, or “human rights” or “women” in Iran, and you’re getting nothing. E-mail trails are sending dissidents to jail. Whole realms of thought are being filtered right off the web — and American companies are helping.

The whole show can be found online in RealAudio and Windows Media format. No MP3, it seems, so you can’t listen to it on the subway home, unfortunately.