The U.S. Congress provides webcasts for many of their hearings. In all cases, the hearings are streaming only, in many cases they are "live only" (no archive of the stream). In some cases, the committees even put a "copyright, all rights reserved" notice on the hearings!
This is really dumb. So, I've started ripping all congressional streams starting with the house and posting them in a nonproprietary format for download, tagging, review, and annotation at Google Video and another copy at the Internet Archive (just to prove this is a nondenominational issue :).
This is a Tom Sawyer hack, a la "painting this fence is *loads* of fun!" I intend to prove to the Congressional webmasters that it is so much fun doing their web sites for them that they'll want to do it themselves so that I go away. Until then, look for "Carl Malamud on behalf of the U.S. Congress" for official news.