There's a trend recently of brewers focusing on using local ingredients in their beer. I mused on one such effort recently when reviewing Flying Dog Secret Stash. Greg Kitsock looks into this trend in-depth in his Washington Post article "Brewers put local hops, barley, yeast and more into their beers."
Kitsock examines beers from local breweries, such as Flying Dog, Dogfish Head, and Brewer's Alley, as well as others. Besides the expected barley and hops, other local ingredients may come into play. Flying Dog uses Rappahannock River oysters in their Pearl Necklace stout. These efforts help support local farmers and local causes. Of course, helping the community is a great way to introduce craft beer to a wider audience.
See the entire article here.