Kenya? Sumatra? USSR? Many, many choices if his allegiances are taken into account.
This whole subject is odd. Presidential libraries are usually discussed closer to the end on the term. Given that I believe we are long past free elections, is Obama planning on running in ‘12? As for the location(s) of his presidential library(ies), it would be all of the above. If there is one thing we do know about Obama, he doesn’t choose just one. If he decides to go to Camp David for labor day, he is attempting to molify his distractors who believe he is on one big vacation.