Also via A Good Beer Blog: Essential Reference of Domestic Brewers and Their Bottled Brands. AGBB gives it a good review. Excerpt:
For the beer geek like me, the DBBB can be used in one or two different ways. There is a handy beer styles index in which separate beers are categorized according to style so that if I know I like the dunkelweizen called Munich Dark from Harpoon Brewery in Boston Mass. I might also like Saranac Season's Best from The Matt Brewing Company in Utica NY. I also will use the alphabetical Brewer Index as well as the Geographical Brewer Index . . .
Beer geek? I appreciate self-deprecating humor, but that's gotta be an oxymoron.