The ASP.NET team has released the first preview version of ASP.NET MVC 3. You can download the ASP.NET MVC 3 Preview 1 from here. The following are the summary of new features in the ASP.NET MVC 3 Preview 1.
- New Razor View Engine
- Visual Studio Add View Dialog support for multiple view engines (pre-enabled with ASPX and Razor)
- New Dynamic ViewModel Property
- Global Action Filters – Define cross-cutting concerns globally and dynamically
- New action result types
- Improved Dependency Injection via a common service locator interface – First-class support for DI all over the place
- Support for .NET 4 Data Annotations and Metadata attributes
For more details, checkout ScottGu's post Introducing ASP.NET MVC 3 (Preview 1)