My quest for the ultimate next best business card entertainment continues.
Another idea is utilizing moving images:
Joel Bauer gave me a couple of rulers years ago, that incorporates this illusion technology. It'd make a cool (albeit expensive) business card to have a moving picture of, say, an origami flapping bird.
Here's an example of a business card designed for a barber:
It might be possible to create the art design on your own:
When he says "1 black bar = 6 empty spaces", he actually means 5 empty spaces. Although Chung Dha Lam says "6". I don't know enough about this to tell how it matters; might be specific to each of their respective drawings.
Anyway, just one more idea.