You can try a demo of Twole G at http://twole.isolasoftware.it/twole1.7 ( or http://twole.isolasoftware.it:8080/twole1.7 ). To access as admin use the following credentials: user: admin, password: twole)
We have released the first stable version of Twole G. You can download it from the download section. Twole G is based completly on GWT and gwt-ext 0.93, a Etxjs wrapper for GWT. Now we are working on the porting to gwt-ext 2.0.