UPDATE!!!!! UPDATE!!!!! PIN Code Expired Problems after December 31st, 2008
If you attended a TechNet event last year and received a Windows Vista Ultimate SP1 Promotional Kit, the PIN included in that kit EXPIRED as of December 31st, 2008.
If you registered BEFORE the December 31st, 2008 expiration date, and ONLY BEFORE the expiration date, AND have not received an email with your product ID please check your Junk Mail folder.
If the email is not in your Junk Mail folder then go to http://www.registerwindowsvistasp1.com/ and contact the customer support team.
You will be unable to register the PIN AFTER December 31st, 2008.