If you are interested, go to Manning Publications Co. and get an (almost) free White (green) paper about IronRuby. It will cost you only your e-Mail address and clicking the opt-out link as soon as you received the first newsletter.
“IronRuby is an implementation of the Ruby language on the .NET Framework. That means when it’s complete it will have the same language features as Matz’s Ruby Implementation (MRI) 1.8.6 but backed up by the intrinsic power that the .NET Framework harnesses.”