QR codes are all over japan. It's a easy for retailers and people to exchange or pass information (text, url, contact) from company/individual to a phone via a graphic. Check it out, it's beginning to get hot in other parts of the world. In the meantime, here's my contact information as a QR code. Take a picture of the graphic with "barcodes" application on iphone to automatically import my contact info into your phone.
----A QR Code is a matrix code (or two-dimensional bar code) created by Japanese corporation Denso-Wave in 1994. The "QR" is derived from "Quick Response", as the creator intended the code to allow its contents to be decoded at high speed. QR Codes are common in Japan, where they are currently the most popular type of two dimensional codes. Moreover, most current Japanese mobile phones can read this code with their camera.