This latest little outburst from David HH of Rails fame is hilarious. Even Charles Nutter must be on the floor laughing. David honestly believes that JRuby is a bridge for people to move to the C Ruby runtime because its a superior environment without the "junk"? I had to do a double take when I read that.
So let's see, enterprises are going to give up on a platform that provides monitoring, profiling, JIT, a deployment architecture that isn't a joke, threading, a compiled byte-code format, clustering, distributed caching, transactions that don't suck, maturity and performance all to build Rails apps?
Ignore the enterprise, it is ok. Grails is settling in quite nicely in the enterprise, and everything else will flow from there ;-)