I am using netbook + navit + openstreetmaps for GPS-navigation, and I realized that in USA it is sometimes important to put the name of the state together with the town name. For example, I live in Columbia (Missouri), but I could not find my Columbia among tens of others Columbias which exist in other states. Now I've renamed my Columbia into "Columbia MO", so it works better. I propose that also the others would do the same, especially for small towns.