I was told by a colleague to contact Microsoft customer service after creating a request right before Christmas that hadn't been processed - after a little information exchange, I was given a key over the phone.
http://support.micro...bers/en-us?FR=1
There must be something up with the site at the moment, because it worked some time back in December for a copy I had purchased for someone, but it has since been failing attempts since my last try a little over a week ago.
Full disclosure, I am an MS employee, but even I had to call the phone #

.