Broke Bike Alley

http://thedesigninspiration.com/blog/2010/12/06/broke-bike-alley/

This is a great way to have a business card! Its super creative and because the "card" is made of a metal and has tool features on it, it's pretty unlikely that the individual would throw it away! Its also a tool that relates to the business as well.
Nice use of marketing in my opinion.

Unfortunately I couldn't cite it properly since there wasn't any information on who designed this, but I provided the link.