Wow. Stumbled on this thread and it was the same question I had! I use Marriott in the US and some locations overseas but can't use them in all locations I need overseas. I have been trying to pick a second program but my travel isn't to a particular destination so it sounds like it won't really be possible to pick a second one that works everywhere. I have low level Hyatt through presidential plus cc but I don't think that covers much. Thanks for advice!