ASP.NET MVC 2 Preview 2
A second preview release of ASP.NET MVC 2 has been released, adding new support for extending client-side validation, metadata annotations, and model validation. I'll be updating the web service technology page later in the week to cover a new set of resources, but in the meantime you can get the preview and source code.
The release notes are also available as a separate download on the same page as the release itself. You can install ASP.NET MVC 2 side by side with MVC 1 but you can't have multiple preview versions of MVC 2 at the same time. If you installed MVC 2 Preview 1 earlier, you should replace it with this new release.