does mostly the same as mentioned above, does this for i think now 4 years (i coded this on a beach in mexico, lets say my memories are fuzzy)
after looking at the market fo QR codes now for 4 years, i don't think i will get rich with just that side project. QR codes just do not fulfill any use case for users (they fulfill a use case for content publishers and advertisers, but non for users)
p.s.: if you want to (really) see people scanning QR codes, there is a page for that, too http://replycam.com/browse.php
For me, it was more about sticking the whole process in an OS X Service available by right-click than actually generating a QR code. Of course you could also write one that sends a text message (via Twilio perhaps), or beams something over Bluetooth.
after looking at the market fo QR codes now for 4 years, i don't think i will get rich with just that side project. QR codes just do not fulfill any use case for users (they fulfill a use case for content publishers and advertisers, but non for users)
p.s.: if you want to (really) see people scanning QR codes, there is a page for that, too http://replycam.com/browse.php