Wow! It's an exciting week to be a dot net developer. 

The long awaited official version of ASP.NET MVC was released during MIX 09.  As far as getting up to speed, there is a butt-load of stuff on the ASP.Net website.

 Also, those of us who cannot write a line code without Resharper will be happy to know the 4.5 beta is out which segnificantly improves its performance.  That being one of my big gripes about the product, especially when you try and run it in a virtual environement with big solutions, am really excited to take this new edition out for a drive.  You can see the details about it here.