You've read about it on the Internet, you've seen us talking about it, and if you were at DevTeach last week you soaked up Justice's inhuman presentation (and Jeffrey's more than human one) on the tool you'll know what the buzz this week is. Now you can see what the hype is all about.
The ASP.NET MVC addition is now available here. It's part of the ASP.NET 3.5 extensions which not only includes the MVC framework, but also includes some new stuff for AJAX (like back button support), the ASP.NET Entity Framework, and there are two new ASP.NET server controls for Silverlight.
Grab it, try it out, watch the skies for demos and tutorials and all that jazz (or read ScottGu's 20 page post on the subject which is more than anyone will ever need) and start building .NET web apps the smart way! The framework is available here for download and there are some QuickStarts that will help you get up and running here.