John Lam, whose RubyCLR bridge led to a position in Microsoft's CLR team, hints that an announcement on his project (my guess, X:Ruby::C#:Java) will be forthcoming. Sadly, he hedges as to whether it will be MIX or PDC. Of course, I'll be going to PDC, but if there is a major dynamic language announcement at MIX, maybe I'll have to go to that as well...