What are QR Codes?
They are kind of like bar codes. The QR stands for Quick Response. It was invented by some Japanese company… which I’m sure you can search for, if you want more information about the background of the technology.
Anyways, with the modern smartphone revolution it seems like these things are appearing everywhere. They basically hold information that a person can scan with a phone and instantly receive contact information, a website, or a phone number. The usefulness of this remains to be debated, but for now it’s a good gimmick that I might put on some business cards. Looks more like a magic eye puzzle than anything else.
You can create your own here : http://zxing.appspot.com/generator/
More information about QR Code: http://en.wikipedia.org/wiki/QR_Code (yeah… wiki isn’t a good reference site… you find a better one and link me.. I’m Lazy)