I want to travel in Vietnam/Cambodia. Tried to find out about the GoAsia pass for Vietnam Airlines from Delta Elite reservations but the agent was clueless, even after after calling two other "desks". Has anybody booked one of these lately for travel on Vietnam Airlines? If so, can I use BKK as a gateway (Skyteam site mentions only PEK, CAN, NRT, ICN). I'm not tied to Go Pass or to Vietnam Airlines and I wouldn't mind purchasing tickets in Asia rather than in the US if they would be cheaper overseas. Any suggestions/advice?