Zonewalker: you are stupid. There is no hidden admin account on any of Microsofts OS's leading up to the current Longhorn beta. Research your **** before you talk about it. The only other accounts created on XP are IUSR account for XP pro (for IIS) and support accounts which have a random password (which may I add, is never blank).

Also, the normal admin account with no password is set up on some OEM versions of XP, or for some lazy bastards who click yes through ever screen and don't see that one of the screens asks for a password.