On the above mentioned Managed JScript if you want your heart absolutly broken take a look here:
http://dlr.codeplex.com/Thread/View.aspx?ThreadId=58121. The Project coordinator posted this "The DLR JScript was experimental for informing the design of the DLR" now I don't
think anyone that read the initial release
here believed that Mnaged JScript was just an "Experimental" language. Way to be open microsoft. I don't need this noise, I'm switching to Java.