I've been doing research into QR codes recently. I think they are fantastic, and offer huge amounts of opportunities for just about anyone who wants to communicate anything to anyone else. Granted, I'm not one to carry a smart phone everywhere; actually, I don't even own a cell phone. I am, however, fond of my ipad, and have a QR reader on it. In the art world (what other world is there?) there are so many great uses they could be put to. Additional info in museums, advertising shows and exhibits, even shipping and storage.
Yesterday I finally received some new business cards that I'd ordered. They have a QR code: my own QR code, that leads right to this website. If I see you, I'll give you my card. :)