Silverlight 1.0 is now gold and being used on several sites such as Halo 3 and Major League Baseball.  Check out Scott Guthrie's blog for additional details on it as well as announcements about Silverlight running on Linux in the future.

I put together an example of using Silverlight to access Amazon.com album information here for those that are interested.  It demonstrates JavaScript integration with Silverlight canvas objects, ASP.NET AJAX integration (with Web Service calls), animations, and more.