Very good: Democracy - Internet TV Platform
A very good start: check it out.
My favorites so far are Sarah McLachlan's "World on Fire" and an Aikido training video. I like this idea: using Bit Torrent, the nonprofit Participatory Culture Foundation helps publishers distribute their content inexpensively. I keep wondering why more TV material (with commercials for profit) are also not published this way. I would like to see more Indy SciFi movies and TV shows, and Bit Torrent distribution with embedded advertisements would greatly reduce costs over traditional broadcasting.
The client software is written in Python and C and is GPLed.