Interesting idea. Are you working together with +Tobias Leingruber
? Because he just released the FB identity card, using the same image as a reference. :-) Link to FB-Identity card: http://tobi-x.com/fbbureau/
So I guess it's time for you to start the G+ Bureau now. I'd definitely order one of your cards as I really like the concept and think it's one of the few really useful applications for QR codes, that I've seen so far.