Google Maps has introduced a new system that plots the locations of 1430 U.S. Breweries and BrewPubs. BeerMapping.com subdivides the U.S. into regional Google Maps to explore all the locations of these establishments.
Included are city beer maps linked for cities like Chicago, Boston and San Francisco. Each location has address information, a link to the brewery website and driving directions.
The BeerMapping.com blog is at http://googlemapsmania.blogspot.com/2006/01/google-maps-beer-mapping-project.html