This is going to sound stupid... but I recall reading some tech blog talking about this website where you can buy keys, and you can bring them to a locksmith to make them real keys. Obviously this is not some regular keys that you can just buy at home depot or whatever, but there was something special about it which I forgot what it was

I can't remember it, and it's bothering me lol... and I've searched engadget/gizmodo and couldn't find anything. I do remember at the time thinking it was really cool and I'd like to buy some for myself.

Anyone?