Microsoft have release for the Beta version of MVC (Model View Control), it has been around in the community preview release for some time and now it is in it's final stages before being fully released.
Scott Gu's Release Notes
Free ASP.NET MVC “NerdDinner”
Scott Hanselmann on MVC
You need to make sure you are running Visual Studio 2008 before you even think about using MVC.
It's now time to take MVC as a serious method of development, as it won't be very long before the final offical release is shipped.