Actually, AS has a pretty good catch-all program with miles earning possibilities on a lot of airlines:
http://www.alaskaair.com/as/mileagep...rs_Airline.asp
Alaska Airlines, Air France, American Airlines, Big Sky Airlines, British Airway, Cathay Pacific, Continental Airlines, Delta Air Lines, Era Aviation, Hawaiian Airlines, Horizon Air, KLM, LAN Chile, Northwest Airlines, PenAir, and Qantas
Asiana and United are Star Alliance members. Joining United's program, for instance, would allow you to earn miles on flights from all Star Alliance carriers.