I just got the news from Guillaume, Groovy 1.0 has finally been released! I've been waiting for this for a long time and I have now no excuse to read Groovy in Action I promised Guillaume I would read :-)
By the way, I particularly like the Swing Builder provided by Groovy. It lets you create complex layout and UIs in a much cleaner way than usual Java code. It compares to F3 code but I prefer Groovy's approach which seems more natural to me after all those years of Java.
P.S: I also need to learn Grails so maybe I can write web sites with Java technology (after years of PHP, I hate it, Zope is just a joke to me and I never liked the Ruby language.)