Add Jaxo and their SnapABar application to the Physical World Connection list.
Jaxo has created a free java app QR code reader, called SnapABar. The app synchs with your camera and then translates the QR code you photograph. They also offer "Barcode generator," which encodes text into four different QR codes.
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The chief advantage of QR code over standard barcode is that it doesn't require great resolution to be understood by a QR code reader. Even a low res digital photo of QR code is readable. This means your camera phone can turn into a QR reader just by installing a reader application.
The options offered for actions on a QR code include; SMS, Voice Call, WWW and email.
To see how easy it is to create your own QR code (physical world hyperlink) click here and type any text.