I mocked this up this business card concept for AddThis recently. You’ll notice it has no contact information… it’s just a simple card that shows an abstraction of the AddThis logo on one side, and tons of services you can share to on the other.
The ideas is to hand them out along with our Clearspring business card, if they need our contact information. As Clearspring launches new products, we can print up “promotional” cards that help explain the product. This could be a good way to promote new analytics, new features, etc as they arise. Let me know what you think of the design.