C# looks great because it is a compiled language which seems to run quite well without too much CPU and does not consume too much memory. And StackOverflow and ServerFault are good examples of an MVC/.Net/C# stack that scales.
C# is also interesting because despite being compiled, it still has a lot of advanced features as a language only found on slower interpreted language.
My server being Linux only (Ubuntu 8.04 LTS), I am wondering if installing Mono in place of the .Net framework is a good idea for production use.
I currently do not have any existing applications using .Net but I am interested in using existing frameworks (like MS MVC).