I'm very excited about it because I'm been invited to give two talks about Groovy/Swing app development, and of course the opportunity to meet with the Groovy experts and members of the Groovy team. With a little bit of luck the whole Groovy Swing team (Danno and James) will be present at JavaOne 2008 too with updated versions of said talks.
Speaking of JavaOne, registration is now open, if you are planing to attend take advantage of the early bird discounts

In the case you are unable to get a spot for 2GX, stay tunned to the NFJS tour, stopping at a city near you, as some of the 2GX speakers are also regular speakers on the tour, bringing you up-to-date knowledge of all things Java/Groovy/Ruby.
Keep on Groovying!