Once installed, you can take photos of people and it zombifies them. I tried it out with a photo of my face, and am pleased with the results. (Probably would have looked better without a shirt).
Mark Frauenfelder is the founder of Boing Boing and the editor-in-chief of MAKE and Cool Tools. Twitter: @frauenfelder. Come and hear Mark speak at the ALA conference in Chicago on July 1.