The TechNet download pages are up and running again. Of course I started the Windows 7 RC and Windows Server 2008 R2 RC downloads immediately (before the pages go down again).
Just a few moments ago I blogged about the availability of Windows XP Mode (and Windows Virtual PC) from May 5th to the general public. If you have a TechNet or MSDN subscription you can download them right now as they are also available on TechNet (and MSDN).
You can find the Windows XP Mode and Windows Virtual PC in the Applications list on the TechNet Subscription page!