A buddy of mine has some questions for you road warriors.

He flies form the USA to Bangkok two or three times a year but otherwise does little flying. He is currently a member of the Eva and Southwest FF programs and usually flies Eva to Bangkok but is considering changing to Star Alliance carriers.

Can he, for example, fly on Asianna but deposit his miles into United Mileage Plus and then redeem them for a flight on Singapore or Thai Airways?

If this scenario works what's the best frequent flyer program for him to join?

Could he join the Continental program and apply for the Continetal credit card giving lots of miles and then after the Continental and United programs merge, then apply for a United credit card giving lots more free miles?

Are there any deadlines that we should be aware of or any othe rinsights you may have?

Thanks!