Visual Studio 2010 Ultimate Current Version:
10.0.30319.1 (RTM)

.Net 4.0 Current:
4.0.30319 (RTM)

General Visual Studio Downloads Page
http://msdn.microsoft.com/en-us/vstudio/bb984878.aspx

Visual Studio Feature Packs
http://msdn.microsoft.com/en-us/vstudio/ff655021.aspx

Visual Studio 2010 SDK
http://www.microsoft.com/downloads/details.aspx?FamilyID=47305cf4-2bea-43c0-91cd-1b853602dcc5&displaylang=en

Visual Studio 2010 Power Tools
http://msdn.microsoft.com/en-us/vstudio/bb980963.aspx

General Visual Studio Shipped Software Updates (none yet for VS 2010)
http://msdn.microsoft.com/en-us/vstudio/aa718693.aspx

Visual Studio ALM Rangers (I am a member!) Site for out of band solutions for missing features or guidance
Main site: http://msdn.microsoft.com/en-us/vstudio/ee358786.aspx
Downloads: http://msdn.microsoft.com/en-us/vstudio/ee358787.aspx

MSDN Subscription Only Downloads
http://msdn.microsoft.com/en-us/subscriptions/downloads/default.aspx?pv=18:370