gwt-hibernate is a library that will bind your hibernate POJOs to GWT widgets.
This project provides the basics to create a web application that uses GWT on the front end and Hibernate on the back end.
It provides code generation templates and support classes that allow introspection, data binding, and validation of POJOs in the browser. Data-bound Form and Grid widgets are included.
Initial code and javadoc has been posted now, see the subversion repository. The code is has been evolved over about two months and is in a "works for me" state. We are using it internally on a project and will update it as we fix bugs and extend it.
You might want to use this library as inspiration for your own GWT data binding setup. Better yet, use the library directly and contribute changes!