Nikhil Kothari, an architect on the ASP.NET team, has been working in his spare time on a project called Script#.  Essentially this allows an Ajax programmer to code in a strongly typed language like C# and compile their code into JavaScript.  His original article can be accessed here.  Recently he added ASP.NET AJAX support to Script# – you can read about this here. 

Hope you have fun with Script#!

Thanks,

— Bash