From the Silverlight website:

Microsoft Silverlight is a cross-browser, cross-platform, and cross-device plug-in for delivering the next generation of .NET based media experiences and rich interactive applications for the Web.

But to Olympic fans who crave much more coverage then was delivered during the 2004 games, Silverlight is a necessary browser plugin that just may satisfy your cravings. NBC and Microsoft are partnering up to bring worldwide audiences 3,000 hours of on demand video and 2,200 hours of live coverage from China. You could watch NBC nightly coverage of the Olympics when the games begin this Friday, 08-08-08. But the best Olympic coverage just may be on the web at NBCOlympics.

The access to NBCOlympics is free, and advertising supported. The pre-olympic training videos are already available for viewing, well ahead of this Friday’s opening ceremonies. And every sport will have detailed video coverage, not just the ones that made it to prime time in 2004. You’ll also be able to watch slow motion replays of your favorite races, and won’t need to rely on Tivo to accomplish it. But you will need to install yet another plugin to your internet explorer or firefox application. The install is easy and near automatic. Just click on one of the pre-Olympic videos that interests you, and you will be prompted to install the plugin. Then prepare yourself for the best and most complete Olympic coverage the world has ever seen. But do it quickly, and prior to the 08-08-08 rush of installs.