Because I spend so much of my time sitting in a car on ferries, I've taken to DVDs in a big way. I've even listened to the commentary for every Simpsons cartoon through Season 6, where the DVDs stop. Yes, I acknowledge that that's the very pinnacle of geekdom. But I bet you don't know why Marge's hair is so tall: when he designed her, creator Matt Groening intended to one day reveal that she was one of his "Life in Hell" rabbits. The hair, then, was to conceal her rabbit ears.
Groening has since abandoned the idea. Good call.