Tonight, Harpoon Brewery is unveiling the second iteration of its 100 Barrel Series Island Creek Oyster Stout, an elixir bursting with the briny goodness of freshly shucked oysters. Don't blanch. While slippery, salinic oysters and a roasty stout may seem as incompatible as toothpaste and orange juice, these these luxuries are ideal mates. For eons, barflies have known that Guinness goes grandly with bivalves. What Harpoon and breweries such as Flying Fish and Porterhouse have done is ramp up the inherent pairing by tossing oysters and their juice into the brew kettle.