The Pipelight project for Silverlight in Linux browsers works with any browser supporting the Netscape Plugin API (e.g. Firefox) and consists of a Linux library loaded by the web-browser and also a Windows program started in Wine. The fake Windows program simulates a browser and loads the Silverlight DLL libraries. The Pipelight work by the developers included implementing the necessary Digital Rights Management support for Netflix within Wine.
For those curious about this Pipelight project for running Netflix and other Silverlight programs within Linux web-browsers can visit this project page. There is extensive documentation and setup instructions for those wishing to try out this promising open-source project.