I agree with this assessment: http://openmymind.net/2010/8/7/A-Snowballs-Chance-In-Hell-IronRuby
Ruby almost exclusively runs on Linux (for the server) and Mac (for the desktop) - both of which are major competitors to Windows. Both of which, with respect to Ruby, are better than Windows. It would be beyond stupid for Microsoft to open the door, ever so slightly, and allow its developers to get a glimpse at this better world.
Interesting that you agree with the assessment.