The 30 best business cards of 2011(blogof.francescomugnai.com)
blogof.francescomugnai.com
The 30 best business cards of 2011
http://blogof.francescomugnai.com/2011/11/the-30-best-business-cards-of-2011/
http://blogof.francescomugnai.com/2011/11/the-30-best-business-cards-of-2011/
I think my favorite has to be the bicycle store one, since it's completely functional (can be used under a slash in the tire to prevent a tube from coming through). It also means that you're all but guaranteed to have it in their wallet.
Ultimately the best part of lot of these is that even though they will costa lot, people will hang on to them. The downside is, that everyone will want one...