Good to hear that Sun is finally serious about dynamic languages on Java. It's no secret that I don't like Java. I don't want to start a holy war here - it's just simply my personal preference, I don't like the 'smell' and 'feel' of it. But it would be great to write stuff in Python and get it running on top of the Java platform. That would surely be good for everybody. It would make more sense if all the big corporates also tried using Jython or Groovy - it would lead to much happier and saner programmers and better products as well. Oh, and it'll run on the Java platform.
Btw, don't forget to read that first link - It must've been awesome to have Larry Wall (creator of Perl), Guido van Rossum (creator of Python), Dan Sugalski (Parrot) and Samuele Pedroni (Jython), James Strachan (Groovy) all in the same room and discussing dynamic languages! :D