This morning I read in the Boston Globe about Google’s decision to allow developers to plug customized data into Google maps, basically legitizing what hackers were already doing ("Google points way to Maps’ code"). They’ve made their API info available at http://www.google.com/apis/
When I ran across the GeoProject USA, I noticed they had already put together their own Google map to present geocoded information. The project is an another interesting heuristic for exploring place:
The objective of Geo Project USA is to visit and photograph every spot in the U.S. where a whole-numbered minute of latitude intersects with a whole-numbered minute of longitude (e.g., 38°14’00"N, 109°55’00"W), in what is better known as a confluence point.