Microsoft has released ASP.Net MVC4 Developer Recently.
This version contains a lot of new features like
New default project template.
The default project template is redesigned to more modern looking website. The template employs a technique called adaptive rendering to look good in both desktop browsers and mobile browsers without any customization. Another enhancement is the use of JQueryUI to provide a richer UI. The login and register links in this template uses JQueryUI Dialog.
New mobile project template
Asp.Net MVC4 supports developing a website specifically for mobile or tablet browsers. You can use the new Mobile Application project. This is based on the JQuery Mobile, a JQuery based library for building touch optimized UI.
The new Display Mode feature lets an application select views depending on the browser that”s making the request. For example, if a desktop browser makes the request, the application might use the ViewsHomeIndex.cshtml template. If a mobile browser requests the home page, it might use the ViewsHomeIndex.mobile.cshtml template.
You can download ASP.Net MVC4 for Visual Studio 2010 from http://go.microsoft.com/fwlink/?LinkID=226335