This year for April Fool's I replaced one of my websites that I use to keep in touch with friends from college, IvoryTower, with a fertilization and pregnancy community, OvaryTower. It wasn't my idea, and I appreciate that most everyone role-played along and pretended to be baby-crazed woman stereotypes for a day, and made it a success. I heart April Fool's.
(These communities really do exist, by the way.)
Currently listening: Augustana—Mayfield