F3, is a new language that Chris Oliver has been working on. It leverages HTML and Swing and is described as a declarative scripting language. F3 already has plugins for NetBeans and Eclipse and will according to Chris, be open-sourced shortly. You can see the language and some of what it can do at Chris' blog.
The code for Dynamic Clustering for GlassFish, Shoal, is now available. An introduction to Project Shoal can be found here. Shoal's goal is to produce a Java-based dynamic clustering framework that can be plugged into any product requiring clustering functionality as an in-process component.
Grails version 0.3.1 has been released and is now available and is the current stable release of Grails.