This is the cheapest I've seen the family pack. If anyone out there is still working with XP or Vista this is an awesome deal. 3 upgrade licenses for $99. It comes with both x32 and x64 install media.
http://www.amazon.com/Microsoft-Win...&tag=slickdeals&ie=UTF8&qid=1300493263&sr=8-1
http://www.amazon.com/Microsoft-Win...&tag=slickdeals&ie=UTF8&qid=1300493263&sr=8-1