How do you register an Apple Airport Extreme?

I just set up a small home network (PC, iPhone 4S, and iPad 3) using the Apple Airport Extreme Base Station.

No problems there.

But, when I went to "register" my purchase of the Apple Airport Extreme Base Station, I could not find a link to do so.

Since I do not have a Mac with an existing Applecare contract, my attempt was to mereley register my purchase.