I have been seeing these in random places. I wanted to know exactly what these are! So I did some research. This is called a QR code that(with an app download) iPhones and other devices can scan and instantly be sent the information that the code contains including urls, text, SMS, and Phone Numbers! QR codes can also be used for PS3 and Wii for games based on game levels and also sharing Miis on the internet. I think this is something that has the potential to encode alot of information and also create sharing at a new level.
For more information or to make a QR code for u visit http://qrcode.kaywa.com/