How to put your logo in a QR code
QR codes is another one of those developer/designer driven fads (IMHO).
I'm not aware of any stock camera application that does QR detection. This combined with the time it takes to open the application and scan it, seems more convenient to place a well thought out url instead.
That's not to say it can't  be the future. But having bad QR experiences now is not going to help QR codes grow.