Google Web Toolkit

This week TSS published an article about the new web toolkit from Google called GWT (note the reference to AWT and SWT). It allows AJAX based UI to be developed using composition of various components (kind of like in SWT - panels, layouts, buttons etc.). You write code in Java and use special browser to test and debug the application, then a special compiler converts the code from Java to JavaScript and the app is ready for a deployment.
I can't tell if it is good or bad, but it sounds interesting (like most of the Google's work), so I think it is definitely worth a look and try.