Silverlight v1.1 Alpha is available and includes the full CLR running in the browser!  Check out the Hanselminutes postcast with extra info.  Very worth putting on your Zune and listening to.  (Notice I didn’t say the "I" word).

If you are running v1.0 Beta, don’t forget that it only comes with JavaScript.  v1.1 includes the DLR (Dynamic Language Runtime) to run dynamic/script languages on top of the CLR.  I think the languages for v1.1 that will be available upon delivery is JavaScript, Iron Python, Iron Ruby and a dynamic VB.   What they hey?  Where is dynamic C#?