Meredith Farkas did a presentation at the New York Library Association Annual Conference on QR codes. As a person who has been incorporating QR codes in student assignments, I was pleased to see someone promoting QR codes to the library community. Here is her presentation:
In order to demonstrate a unique QR code application, Meredith showed this video:
I received a couple of questions via Twitter during the session from people who have not seen QR codes catching on in their community. I believe that QR codes need a champion as well as training. In other words, if you believe that they are useful, then you need to use them and teach others about them. You should point out where they are appearing in advertisements and marketing material, for example, so that people know that they are all around us.
Others have done presentation on QR codes including these by Renata Curty:
I've also written about QR codes, including:
Slideshare for additional presentations on the topic.