According to DailyTech.com a workaround has been found allowing purchasers of the Windows Vista Upgrade to install Vista without having XP installed. The instructions can be found here http://www.dailytech.com/article.aspx?newsid=5932
name='Rastalovich' said:Is it the same theory that allows u to install fresh XP with an upgrade version ?
name='Nagaru' said:Hmm, how did she wipe the disk?
name='ai_01' said:even if so u get ur lisence, burn the regular one from someone else =P
name='ai_01' said:i posted this earlier but i really doubt anyone got it u can get windows vista upgrade for 80 with shipping if ur a student, teacher or K-12 student. linky here
name='WC Annihilus' said:Just to mention, this will not work for K-12 students. It says so on that page (though not obviously)