Today, I just visited http://ASP.Net and found that Microsoft has released ASP.Net 4 Beta 2 and Visual Studio 2010 Beta 2. You can find some of the exciting changes on the following URL:
And you can find Breaking changes on the following URL:
Some new features are really amazing. Lets start with this new one instead of using old.
Cheers with ASP.Net 4 Beta 2