Microsoft made available today the beta 2 of VS2010 and .NET 4.0. It is available for MSDN Subscribers on the 19th and its general availability is from the 21st of October. You can download the beta 2 from https://msdn.microsoft.com/en-us/subscriptions/securedownloads/default.aspx?pv=18%3a370.
Apart from bug fixes the Beta 2 also is supposed to have templates for Sharepoint solutions and Azure. More details on Somasegar’s blog http://blogs.msdn.com/somasegar/
I will write more on VS 2010 when I have had a chance to play with it.