Hey, Swami! All things Ouija-y: The nicely-named and URLed (but not nearly so perfect as this) Museum of Talking Boards.
As a design collection, the Gallery is fantastic. It's even got something called the ka-bala which instructs you to chant "PAX, SAX, SARAX, HOLA, NOA., NOSTRA", which, if I were you, I wouldn't chant.