I hope you don't mind. When I read this article in the N&O yesterday you were the first person I thought of. It turns out a couple of guys from Raleigh have developed software using mapping technologies to locate breweries. At this point they're working with a database with over 1,500 breweries and 8,000 beers from around the world.
This is totally Web 2.0 in that there is a group of people working on the software and the brewery database allowing the contribution and development to be open source and organic. I wish them nothing but success.