As I type this I am watching DiggNATION live from Amsterdam on http://revision3.com/watch/. It is being streamed as a WMV via Microsoft Silverlight. I had to download Silverlight specially for it and couldn't get it to work on Firefox 3 on my Macbook Pro, but managed to get it to work on Safari. This is my first experience with Silverlight and it is bad. The sound keeps loosing sync and the sound isn't really that good. Why not just use Flash or quicktime?