So i have received a bunch of pictures to my mailbox as a forward from a friend that i HAD to share with everyone. Its a series of BRILLIANT advertisement which incorporate physical elements around them. VERY eye catching and defiantly not your everyday billboard. Check out the first few,
Consumers tend to build blindness to a marketing method if it got over used, such as your everyday bulletin boards. These type of ads will break such pattern and actually attract the attention more effectively.
I bet that it would be easier to implement on the web since the functionalities of a web app are limited (with respect to physical objects in real life).