As I saw QR Codes and their use for the first time I always thought that is the solution for business cards in the future.
However we at Graz University of Technology began a master thesis with the aim to gather experiences about these possibilities. Now I can present the first prototype of a branded QR Code within a URL. This URL will lead you to my business card, which will be stored automatically at your mobile phone.
My official contact card at the university wide information system is shown here and here you will find some more informations about QR codes and our project (in german).