Broadcast.com used to have lots of realy good streams in different formats, but now its part of yahoo platinum. o well below is a bunch of links i have found for streams. other than the one on nates site.
http://www.gumbynet.com/shuttle/shuttle_realvid.html
http://www.ambitweb.com/nasacams/webcams.shtml
http://www.unitedspacealliance.com/live/nasatv.htm
http://www.team188.com/2002/videos/nasatv.shtml
Its really too bad that broadcast.com went away they had the best streams, of course these streams may not work if the mars landing gets bumped back.