Dave found out something I didn't notice about the Halo 3 HD videos that were published recently on MSN...they're using Silverlight Streaming.
Channel 9 is running an excellent video on Silverlight Streaming and how it is being used for the Halo 3 HD Videos I previously mentioned here.
Check it out here!
DaveDev - Developer enlightenment through the power of caffeine. : Silverlight Streaming