QR Codes are in wide use in Japan - cell phones incorporate QR Code scanners that can read the codes and direct the user to a web page automatically.

This is a great way to link the physical to the online world. There are so many possible applications:

- Retrieve information about a place or thing
- Report something about a physical place or thing (this public bathroom is in need of service).
- Complete a purchase (buy me)
- Confirm my location (security guard was here)

I wonder if I can get a QR decoder for my Blackberry!