This interactive map of the U.S. was constructed using Google's autocomplete feature. For each state, the search form was filled in with “Why is [insert state] so “ and the autocomplete results were noted, analysed, sorted, and assigned. At the site, mouseover a state to see what autocomplete terms came up most often. The accompanying post also shows some of the stereotypes generated compared with actual data maps. Link
-via Metafilter, where commenters contributed autocompletes for cities, Canadian provinces, and countries around the world.