I guess it would have to be somewhere that was already very use to having an a lot of people foreigners in residence. This requirement bumps the Orient right of the list, and I would have been cool with Tokyo or Kyoto. I would say Jerusalem, but we would have to be able to expect a certain level of security and peace. Almost anywhere in Africa must be dropped for the same security reasons.
This leave the, loosely speaking, Western countries. For balance of power issues, the new seat should be given by its nation of origin (as the District of Columbia was given) so that one could say that the seat of government was not in any one nation-state. This takes away all capital cities and cities with which its government would not be willing to part. That second part forces us to drop New York.
Based on the above, I'm going for Houston. Keep in mind, I hated living in Texas, but I think it is the natural choice. If anybody else has an idea that fits the above criteria, I am certainly willing to hear it.
That said, why don't we just build a city on Antarctica. I would hope that a world government would legislate as little as possible. If we put their chambers in Antarctica, each session could not possible last long enough for stuff to fucked-up too badly. Actually, fuck Houston; I'm going with Antarctica. We could call the city.... Pangaea or the Swedish work "Fukitscold."
