Translate Beyond Print to find more on Clickable Paper
http://translate.google.com/translate?hl=en&sl=de&u=http://www.beyond-print.de/2012/05/05/clickable-paper-als-alternative-zu-qr-code/&ei=idaoT7y-CPCL4gS3kOCtCQ&sa=X&oi=translate&ct=result&resnum=3&ved=0CEUQ7gEwAg&prev=/search%3Fq%3Dricoh%2Bqr%2Bcode%2Bdrupa%26hl%3Den%26biw%3D1024%26bih%3D667%26gbv%3D2%26tbm%3Dblg Not sure that will work as a link. If not search on Ricoh and clickable paper. I do realise that drupa is in Germany. But I also think that beyond.print could get a substantial English audience if more was available. Google translationis good but I'm not quite sure about all of it. So far also found this video by the way, the soundtrack is interesting, there is more variation than you might expect.