Even if this is a fake, what a great idea! I particularly like their concept for Tweetmeat, where you get to tweet your friends in meatspace.
I am going to find a way to make this work.
Implications - Having business cards readily available in your pocket for potential customers or connections you may encounter is a necessity for anyone with a professional occupation. Business cards should make a statement about your company and be memorable. A great example is the featured business card that is actually made from beef jerky.