A dollar design I did for the Canadian based, Karma Cash. I am not sure if this ever got printed (might still be in the works) but here is an example of if you post your work, they will come. I posted my designs for the Dollar Redesign Project by ISO50 and shortly after learned that my work had been shown on a blog all about redesigning money. From there I was contacted by Karma Cash to design this bill for their project.
Essentially, the idea is to make the idea of paying it forward into something tangible in something you can pass between people for doing good deeds. Each bill has a serial number that one can track and see the deeds of each person who has had the bill. Pretty cool.