Disclaimer The opinions expressed herein are my own personal opinions and do not represent my employer's view in anyway.
Reading Paul a post on Hacked.com I saw mention of a new thing - the Web Platform Installer. This is a nifty tool that can be used to install the .Net Framework, ASP.Net, Visual Web Developer, ASP.MVC, Silverlight tools and other bits and peices. All from one very convienient and SIMPLE interface.
Using Virtual Machines for development these days I am often setting up new machines. This will save me a bit of time there. It's also great for helping friends and noobs get started with web development and will reduce the amount of time I spend on emails and awkward phone calls.
Well done Microsoft!