In honor of π Day, here's a fun link: Futurama Math. One of the best bonus features on the Bender's Big Score DVD is the math lecture, by a professor from App. State up in Boone. (The best feature is the how-long-can-they-keep-this-up episode of "Everybody Loves Hypnotoad") Loads of fun geekiness relating math concepts to Futurama episodes.