Just so you know, there are cases of infected 2013 Narwhal by Sierra Nevada floating around out there. I picked up a four pack and each beer so far has tasted like a chewed up medicinal B-vitamin.
As this isn't a bottle conditioned beer and after being assured by others in our bottle share group that theirs didn't taste quite that bad, i've come to conclude that there are indeed some pretty infected beers floating around.
Be forewarned. See if your LBS will sell you a single to try first before buying a four pack or a case worth.
Beer so good, it's frightening.
2014: Seven Heavens Series One: Vilon, Mystic Melomel, Skeeter Pee.