Has anyone been using the Gardens Point Ruby .NET compiler? I’ve tried it with some simple programs and it seems to do a reasonable job of compiling them (though the end results when they run are not always identical with the Ruby interpreter). They are still in beta (0.6) and it remains to be seen how well they will ultimately cope with all the gnarly little twists and turns of Ruby. Still, they have made pretty good progress so far, so it’s a project worth watching.

http://plas.fit.qut.edu.au/Ruby.NET/Default.aspx