I was wandering around the W3C site, as I am apt to do, and I finally took a little time to read up on XForms. There's a good intro for people who approach XForms from an HTML background. It explains how to do with XForms what you do today with the form element.
When I get a chance to upgrade to the next Firefox Alpha, I'll have to try out a couple things. Here are some benefits that make XForms worth looking into:
As well, there are new submission methods to try out and access to XML data for initial values. Lots of things to play with. I've come around to XForms because I think it's designed with the knowledge of what we've really been doing with forms in HTML for all this time.