Updated VPC images have been released...
Download here - the images will expire in January 2009
http://www.microsoft.com/downloads/details.aspx?FamilyId=21EABB90-958F-4B64-B5F1-73D0A413C8EF&displaylang=en
Images available:
Windows XP SP3 with IE6
Windows XP SP2 with IE7
Windows XP SP3 with IE8 Beta 2
Vista with IE7