Eclipse committer Tom Schindl has written a blog post taking the Eclipse JFace Viewer and Databinding concepts and applying them to GWT.

Without question much of the Databinding-Framework is not working but at this stage I don’t mind. The good thing is that all those low-level modules use only classes already available from GWT so porting the whole framework is only a matter of time.

For those who have done some SWT/JFace programming, this is quite interesting.