The ASP.NET team has been working on an ASP.NET MVC implementation for some time now. We're actually releasing them under two different paths: Preview released and Betas. There are Preview releases which are released through CodePlex which are released more frequently to get community feedback quickly. The Beta releases are put through a number of quality gates to ensure code stability and quality.
The team has also been building a gallery to show off great MVC designs and have now made it available for viewing.
And for all you designers out there, there's even a ASP.NET MVC Design Competition going on. Submit your website design for a chance to show off of your design skills to other developers and designers. Submit your designs by January 31,2009.