It has been a very long road for this one, but we managed to release RHQ 4.
We managed to standardize on GWT as our user interface framework. Here's an example of what the new GWT based UI looks like:
There are still a few JSP pages around, but for the most part, the RHQ GUI is now a GWT application with SmartGWT components. One of the fun parts of this job is to learn new and exciting technologies (though I guess "new" is relative - but I still consider GWT a "new" GUI technology, compared to things like Struts and JSP).
Take a look, give it a test drive and see what you think.