Edit: But isn't it just like an emulator... I mean... I could use any windows program on my linux box with wine
"Mono includes a compiler for the C# language, an ECMA-compatible runtime engine (the Common Language Runtime, or CLR),and class libraries."
So it's not an emulator. Everybody I know uses it, I just haven't eve done so, so I couldn't tell you too much detail about it. The people at www.programmingforums.org could tell you more about it, if you want.