The question about the house of Atreus: "Who was Pelops and what was his crime?" is a mistake on my part (how unlike me). That question should have been "Who was Tantalus, and what was his crime?" - Pelops was the son of Tantalus, first sacrificed to the gods, later revived to marry Hippodamia. . .
So there's 3 free points for everyone. . . . My only defense: it was late, I was tired.
UPDATE: good work for those of you who knew about Pelops' fixed chariot race . . . we hadn't actually covered that in class, and that wasn't what I'd had in mind anyway. I was thinking of the taboo-breaking stuff like child-murder, cannibalism and the like.