Originally Posted by
watercooled
The 64/32 bit question wasn't there when I originally answered. Anyway, like Vimeous said, both 32 and 64 bit DVDs are supplied in the box and I'd be very surprised if the same didn't apply to the upgrade version. OEM versions however will probably be one or the other like previous versions.
@tfboy - I think you are getting a bit confused about XP mode. It's not a full license so no you certainly could not legally use it on a separate machine - it's licensed to run on the same machine as 7 in VM-mode only. As for your second question - yeah if you had a full XP licence and a FULL (not upgrade) 7 license then you could run XP in a virtual machine on 7. Anyway XP mode is a VirtualPC exe, not an iso or something so can only be used as a VM.