Now every Windows Mobile phone owner (not to mention Symbian, UIQ etc) can also read these codes with the free Quickmark QR Code Reader you can get available
here! Downloads are in CAB format, but that's cool with CABviaActiveSync right?
You can create your own QR Codes here.
Paul (MVP): I've given it a go (see pic), and it works amazingly well... see pic below!
Edit: If you find you have Chinese rather than English, track down the install directory and rename QuickMark.0409.dll to QuickMark.0809.dll (assuming you are using a UK English device - US English devices should be fine out of the box)