I think I'm the high-scorer so far, although I wished I had never picked up the WSJ in my driveway yesterday and seen the article! After about a half-dozen tries, I'm up to:
Points: 559,431
Level: 12
Traveler IQ: 132
(Screenshot cheerfully provided on request!)
Once you get to level 12, it gets really hard with lots of places in India and Russia and Africa that I had to guess at.