A site that generates a map of visited states occasionally makes its way around the blogs. I had seen this once before a long while ago, and now seems as good a time as any to bring it up again.
Some of these "visits" are of the "just passing through" variety. The biggest stretch is probably Michigan, where my visit consisted of a couple waits between flights at Detroit airport. What you see confirms me as a product of the mid-Atlantic region.
Create your own visited states map