google web toolkit

Has anyone looked at google web toolkit ( GWT Project ) ? I saw a presentation on it this evening and it was really quite fascinating. In short (for those of us -most of us I assume - who come from a Java background) it allows you to take java code, and "compile" it to an Javascript / HTML such that it is an AJAX user interface. Very cool - I am wondering if anyone sees a fit wherein something likge GWT can be used within Rails in some fashion? -Ralph