Mobile Codes in Japan

2D Mobile codes are very popular in Japan - below is a YouTube add about mobile Cods in Japan.
Mobile Codes are supported on most smartphones (cameraphones) including the iPhone

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Japanese commercial, DoCoMo ...

Powerpoint Presentation on 2D Mobile Codes: http://mobilkonferencia.hu/2007-2/eloadasok/mobile_codes-vamos-hegyi_attila.pdf