There are a lot of new technologies coming out that convert C# to Javascript. The best example I have is http://bridge.net/. It would be nice if we could get an integration of something like that so I could write my code once in C# then translate it to Javascript and run it in CloudScript. That way I don't have to duplicate logic twice.
Example:
I'm currently in the process of writing a multiplayer card game and I need to write the card logic on the client so I suggest moves and make sure they don't make bad moves. The game will be server authoritative so I'll have to have the same logic on the server as well. It would be great to write it once in C#, then translate it with something like bridge.net and then run it in CloudScript, but this would require the Bridge.net runtime to be integrated with CloudScript.