BreweryMap.com

Launched by two North Carolinian programmers who apparently couldn't find beer on a trip to Denver last year, this handy site allows you to see all breweries, brew-houses, and taprooms (complete with a list of available beer at each) within 100mi by superimposing info from an open-source brewery database on a Gmap, so it's surprising that they don't just show you every liquor store that sells 40s.