What is Moonlight ?
Moonlight is an open source implementation of Silverlight (http://silverlight.net), primarily for Linux and other Unix/X11 based operating systems. In September of 2007, Microsoft and Novell announced a technical collaboration that includes access to Microsoft’s test suites for Silverlight and the distribution of a Media Pack for Linux users that will contain licensed media codecs for video and audio.
I tested it in Linux Mint 7 and it works fine with Silverlight 1.0 website. The bad thing, it not works in Silverlight 2.0 
Next Release ?
Moonlight 2.0 still in Preview Release, this version will be compatible with Silverlight 2.0
Minimum Requirements…
An x86 or x86-64 computer with at least 128 megs of RAM to use Moonlight, Firefox 2.0 or Firefox 3.0.
A wordpress Intellectualism 