Do they still have any keys left? BTW, I was one of the few who got a key/download finished on the first Friday that you were supposed to be able to get it. Tried installing it under VirtualBox - but that seems to have failed. Haven't tried installing again since then. Even the main microsoft.com site wasn't accessible for a few periods on Friday from all of the traffic for some reason.
I didn't have any trouble getting a key or downloading it. I believe it will be available to download until the end of January. I would think you would be able to go to the download site, try to download it again and right before it provides you the download, it gives you a key to use. I'm probably going to install it on my old computer (P4 1.3ghz 256mb of ram) if it will let me. Since I have my main rig triple booted, I'm not going to attempt to install it on here as well.