I have been falling in love with QR Codes, the little nerd in me jumps with joy at all the possibilities and even the action of interacting with physical things with my digital device is enthralling.
However, when I discussed QR codes with a small group of web designers they did not like them very much. And a few times in public when I saw them, my friends did not know what they were.
That all may be because they are new, but they may be right. I know I am too biast to make a good decision.
So here is the question: Are QR codes (and the like) good UX in advertising, business cards, and the sort. Do they break any fundamental laws of UX or do they help UX problems and engage users.