The Justin.TV guys gave me some tips on how to improve the video quality of the webcast, so it should be looking and sounding a lot better now... Let me know! There's no audio at the moment, since we're not open until Friday night, but the picture looks a lot better to me. You should now be receiving H.264 at 480x360, 15 FPS, at somewhere in the neighborhood of 500kbps. I suppose it's possible that that's too high bandwidth for some people? I no longer know what's common here in This Modern World.
Rather than using the video encoder built in to the Flash plugin, I'm using Flash Media Live Encoder 4, which has a lot better options, and (bonus!) can be run from the command line, making it easy to automate.