Linux users running into the web's brick walls of "This site requires Microsoft Silverlight," rejoice. The Moonlight team has brought Silverlight compatibility to Firefox browsers on Linux systems. Moonlight installs like any other Firefox extension. Once it's installed, you should be ready to use any site or webapp that requires Silverlight 1.0; 2.0 access is, hopefully, coming up soon. You should also be able to work inside Silverlight apps with traditionally Windows-based media codecs, another compatibility bonus. Tell us how Moonlight works for your Linux systems in the world of Windows in the comments.