The Klein Four Group

In a post today, Lemming reminds me of The Klein Four Group, an a capella group of grad students at Northwestern's mathematics department. I agree with him that "Finite Simple Group (of order 2)" is extremely amusing, as it contains tons and tons of cool/horrible mathematics puns. (I especially appreciate, among other things, the references to wedge products and tensors.) One of the people in the group was an undergrad in the math department at Georgia Tech, and I remember word about the group being passed along among that crowd a while back.