Visual Studio 2010 Beta 1 is now available for MSDN subscribers to download. It will be more generally available on Wednesday, according to Soma.
A great whitepaper which describes the new ASP.NET 4.0 features are available here. You may notice is that ASP.NET MVC is not included in Beta 1. ASP.NET MVC will be included as part of the package in VS10 Beta 2.
