Here is a great article on how the 2010 Olympics is being streamed through IIS and what all is involved. I would like to say thanks to the team that is running this, I have enjoyed watching online.
Alex Zambelli breaks down all the elements and some high-level changes from the 2008 Olympics. Great work guys.
Article – http://blogs.iis.net/alexzam/archive/2010/02/16/streaming-the-olympics-how-we-got-here.aspx
Alex’s blog – http://alexzambelli.com