Add support for QR code (Quick response code).

Users with a camera phone equipped with the correct reader application can scan the image of the QR code to display text, contact information, connect to a wireless network, or open a web page in the phone's browser. You could insert it on flyers or postcard and users can download or import the company contact into the user address book by scanning it.
More about QR code.
http://en.wikipedia.org/wiki/QR_code