Found this over at the Around the Scuttlebutt, who credits Rev. Kim, for the link.
Where I've visited in the US:
visited 28 states (56%)
Now some of these visits were made in conjunction with a job I had for a while with Uncle Sam. Then there's the map of the world ... again, with places visited thanks to Uncle Sam:
visited 12 states (5.33%)
Create your own visited map of The World or determine the next president
All in all, a mindless pursuit. FWIW ... I had no idea I had visited over half of the US.