Here are a bunch of links to Vista related websites:
http://www.microsoft.com/betaexperience/
Register for the Vista and Office 2007 beta experience.
http://www.seewindowsvista.com/
SeeWindowsVista is a showcase for what is possible with Windows Vista. Have a look at iBloks for example!
http://www.iis.net
All about IIS 7.0 (You'll need it :) IIS 7 looks completely different )
http://connect.microsoft.com/
Download the latest beta's (invite though)
http://www.projectglidepath.net/glidepath/default.aspx
Project GlidePath -> a must see
http://www.netfx3.com/
My home for the coming months, if not years :) This is THE website grouping toghether info about .NET 3.0 (aka WinFx) development.
http://channel9.msdn.com/
Been around for a while, but still 20 on a coolness factor between 0 and 10. Some great content, some Zzzzzzzzzzz.....