“…A QR Code is a bar code that can be scanned using your camera phone and a QR Code Reader. You can easily create QR codes that serve as hyperlinks to mobile content. In many parts of the world the scanning of a QR Code has become the door to the mobile Internet for the average mobile user….”
You can easily create a QR code in .jpg or .png for web, SMS, data, text, RSS feed.
Here is the QR Code for The Proverbial Lone Wolf Librarian’s Weblog I creates in seconds: