Provides demographic information in an easily understood format: data maps. They have created hundreds of interactive data maps of the United States. The beta version is supported by the National Science Foundation and New York Times. The beta version is focused on New York, but data for other areas is available in the “map” section. Data is initially presented only at the County level, but you can map data at the census block level by using the area report tool. This tool provides easy access to demographic information about the United States, from 1940 to 2000.