My good friend lives in NY, and is just now getting addicted to FFPs (ah, the birth of a new Flyertalker

). Anyway, he was asking me for my suggestions. I told him to focus on a single airline, to gain elite status, and thus enjoy the perks. Of course, he asked, which airline should that be?
Since he is going to be paying for all of these flights himself, actual elite perks don't matter, but more what airline offers the most frequent deals...weekly webfares, special fares, etc.
Thanks BB