ASP.NET MVC 3 Preview 1 Source code

Microsoft has uploaded the source code for MVC 3 Preview 1. You can download the source code from below

You can download the preview 1 from below link

There are some useful features (considered to be included in MVC 3) is now available in MVC Preview 1.
Some of the features in preview 3 features are below

  • New ActionResults
  • New Razor View Engine
  • HttpNotFoundResult, HttpRedirectResult with support for Permanent Redirects, and HttpStatusCodeResult.
  • Global Filters
  • Model Binding to JSON
  • Validation – .NET 4 introduced IValidatableObject and improvements on ValidationAttribute to provide even better validation and ASP.NET MVC 3 will offer better support for them.
  • Dependency Injection and Common Service Locator Enhancements

You can find more information
It is very early stage so there are no guarantees that all these features will be included in the final release.