IronRuby is coming.
Expected to be released this year Microsoft's IronRuby is quite a unique project. Fully open sourced, GPL-based license, hosted at Rubyforge, accepting external contributions. Yes, Microsoft's IronRuby. Cool.
IronRuby version of the famous "Try Ruby in your browser" So anybody with 15 free minutes at hands could play with IronRuby. That sounds like cool way to learn IronRuby internals.
IronRuby includes ir.exe - nice interactive IronRuby shell. Thanks to open sources
I managed to hack up simple AJAXish Web version in just one night.
ASP.NET 3.5 application hosting IronRuby runtime + simple Web console
emulating ir.exe.
It's hosted at http://www.ironruby.info/ir,
currently at version "0.first.hack". Go play with it, but please don't
crash it often.
For more information, please refer here..
http://www.tkachenko.com/blog/archives/000742.html

I hope, you'll really appreciate the effort by the developer.
Thanks