John Lam (Ruby CLR guy) hired by Microsoft
It is kind of old news, but did not hear it, so maybe you guys havn't heard it either:
http://www.iunknown.com/articles/2006/10/20/dynamic-languages-microsoft-and-me
(Great domainname b.t.w.)
I think he was on DotNetRocks some time ago, but I'm not going to check witch/wich/who episode. You go look for it if you want to hear more about the RubyCLR for .NET here