Census Data in Google Earth
A student at Stanford has come up with a cool app for Google Earth called gCensus.
Currently, only the US Census 2000’s Summary File 1 (displaying population characteristics such as race and age) is available for mapping but there’s no doubt the developer and others will mashup more Census data in the near future.
See details at http://gecensus.stanford.edu/gcensus/index.html.
The student (A phd candidate) is in search of others to help with his efforts so if you have skills or bandwidth to share please contact him.