Um, I think I called for this in a comment awhile back on this site. Anyway, the streaming section for each show now contains MP4 links for video, as well as a “More Video Formats” link which takes you to archive.org where there is a youtube-like flash version, complete with embedding code.
Also, there is an OGG THEORA version, which of course is completely GNU/LINUX open source. I specifically called for that in the comment (which I’m too damned lazy to go back and link to). For the fanatics, there are MPEG-1 and 2 versions, which are suitably DVD size and could be burned onto a DVD for distribution. It looks like the THEORA version is only for recent shows, but the MPEG and flash versions go back all the way to the beginning of the show, in the late 1990s.
There is also a videocast and podcast feed. They thought of everything.