Flight Graph could look at your airport-related check-ins, graph your travel, and give you a snapshot of where your whirlwind travel has taken you.
Would you like to see this fleshed out?
This initial snapshot was prepared during the 2011 Foursquare Global Hackathon using a local copy of Python and the author's Foursquare API token to access 6 months of one person's airport data. If you would like to see this fleshed out on appspot so that you can sign in as well (including other features such as animations, comparing maps with your friends, etc.), give him a shout!