I am thinking of getting both the US Airways CC and an AA CC in hopes that when they combine their points programs much like when UA and CO did I can easily have a quick 70k point head start into the game. I have read that it may take 18 months for the programs to fully combine, which I am OK with.

Are there any risks of doing what I am thinking of? Other then they may not combine their points programs or it may take a while for the points to merge?

Thanks for any advice.