From Ji Lee, the designer of the Google Me Business card, comes this All-In-One Card Stamp. With over 14 different greetings to choose from, this stamp will definitely save you money in a clever and funny kind of way.
All you need is a stock of white blank cards upon which to press the stamp. I suppose it wouldn't hurt if you also added your own personal touch with a note at the bottom.
Implications - This is the kind of product that will help you out, if you're a funny guy. Your friends will buy into your obvious gimmick, and you'll earn points for eschewing traditional cards in favor of a hilarious one.