Windows Vista Software from TechNet Software Registration Problem - Followup
The website problem outlined in a prior blog post has been resolved. This issue was resolved by extending the the deadline for obtaining your key from the registration site www.registerwindowsvistasp1.com. If it still does not work, try deleting the cookie for the site or do the registration from another computer. The new expiration date for obtaining your install key is the end of December 2008. Please write a comment to this blog if you continue to have a problem with registration. I am very sorry for the problems you have experienced and I hope this resolution is acceptable to all.
PS. I personally tried a code that did not work yesterday and it did work today!