Martijn writes -

Hi Makezine people, Rein gives us a demo of how you can create a coloured barcode and scan it with your mobile. By adding colour the information capacity of the barcode increases, this leads to many new ways of using the barcode. For instance: put a coloured barcode on a poster, scan it with your mobile and directly get the ringtone of that particular brand on your phone.

Barcode + Colour + Mobile = ? – Link.