Different. Business cards that marry Digital to Analog. Something personally created that is different every time. A unique product that raises peoples interest in it, and the process that creates it.
An instant camera (a Fuji mini 50s)
Film for the instant camera (Instax)
Transparencies (overhead projector type)
Possibly a computer and printer, or some artistic skill to draw/write on the transparency
Although this process can create business cards, what you do with it, is limited by your imagination.