The Old Dominion Brewing Co. in Ashburn, VA has an Oak Barrel Stout that has been conditioned in oak bourbon barrels. "The Oak Barrel Stout is a delicious blend of heavy roasted malt flavor and sweet bourbon flavor with an overlay of vanilla." I tried it and I must say it was very good if you like dark beers.

http://www.olddominion.com/pg/ales

Scott