Yes, you can buy activated APs at the airport strore. One plus of buying them at the airport is that it is a good way to spend the time that you normally wait for the baggage handlers to unload the plane and truck your stuff to the luggage claim area. When we bought our APs there in June I the CMs in the store were a little slow, and they were experiencing problems with the ticket printer, but we still made it to baggage claim just as they had started the carousel rolling.