I've been to the brewery (about 90 min drive). They use blueberry extract in it. Made from Maine blueberries.
This is my wife's favorite beer of theirs. They just expanded to make more of it (along with their 420). It's about the only blueberry beer i'll drink and i don't care for them.
_________________________
Brewing Since: 10/12/08
Fermenting: Wheat IPA
Carbing: Ordinary Bitter
Conditioning: Standard Lager, Vienna, MaiBock
Drinking: Best Bitter, 1885 Scottish IP, Dry Stout, 80/-, Harp clone, Braggot
On Deck: Scottish 60/-