I am evaluating Griffon now. One thing I noticed is that in the Griffon mailing list archive, the latest thread was dated June 24th, 2010, which was almost 8 months ago. That seems to me not much is going on with Griffon. Anyone has idea what's going on with Griffon?
4) Almost every Java/Groovy conference in 2010 had a Griffon talk and there are more lined up for 2011 (I just came back from Spring I/O Madrid where a Griffon talk had good acceptance based on Twitter reactions posted by attendees and hallway chatter).
5) The development team welcomed two new members: Rene Gröschke and Alexander Klein.
New plugins are added every single month too. The development team is preparing for releasing 0.9.2 final very soon.
You're more than welcome to give Griffon a try and swing by the mailing lists or twitter (@theaviary) should you need assistance (JavaRanch too!).