A similar, much older project is the whimsical but fascinating Pop vs Soda page
Also see the The Neighborhood Project which is doing something similar just for San Francisco neighborhoods
A 38-State Nation is an interesting related map drawn by a professor at California State University
Mapping Links
CommonCensus uses Google Maps to visualize the five most recent contributors when you click on them
See the Google Maps Directory for other sites that utilize Google Maps in new and different ways
Political Links
For an overview on gerrymandering, see the excellent Wikipedia article on that subject
Data Links
CommonCensus's original database of place names comes from the freely available USGS GNIS (United States Geological Survey Geographic Names Information System)