I wonder what will happen to 1.9 branch. It's not supported well by anything. 1.9 is suppose to be a transitional branch anyway... a place where Matz can experiment a bit. 2.0 is suppose to be the next big thing (like Python 3000) but I have no idea if that will ever see the light of the day.
I'm placing my bets on JRuby, Rubinius and MagLev in the meantime.