Just returned from Vietnam and used myvietnamvisa.com to get a visa on arrival. It was quick, easy, and I had no problems when entering at SGN. It's legit; the New York Times even had an article on it.
Clubs: AA F (LAX, MIA); AA J (All hubs, BOS, SFO, LHR, NRT, SCL, EZE). BA F (SFO, YVR, LHR); BA J (LHR). CX F (HKG); CX J (LHR, HKG). JL F (NRT, HND). LA (SCL). IB (MAD). AY (HEL)