Ruby.NET and IronRuby
Or maybe this blogpost? http://www.iunknown.com/2008/02/welcome-wayne-k.html
Come on, but you saw this?? http://groups.google.com/group/RubyDOTNET/browse_thread/thread/1752830c857620b0#f34570019c391974
The good thing here is that two distinct projects both having the push of Ruby on the .net platform in mind are combining. The bad thing that as usual not everybody is happy with it.
In the end it will - this is my opinion - help Ruby itself to manifest on the .net platform. Another positive aspect is that by helping the DLR improve it will help a lot more projects relying on the same foundation, too.
Hey, ho... Ruby, go, go...