So, I'm absolutely in love with ASP.NET MVC. In fact, I'm pretty sure I'll NEVER go back to Webforms development (except, obviously for a bit of maintenance here and there).
Metrics that I've seen initially indicate that MS thought maybe only 5% of ASP.NET developers would be interested in MVC. My guess is that the number will be a bit higher.
Have you used it yet? planning on doing so? Or are you fine with WebForms?