this looked like a spectacular idea for a moment, until I saw that Gramicon credits are pretty much only good for delivering onto a charity or shopping with "retailers", I'm assuming that small number of charities/retailers who've made a deal with Gramicon, and Gramicon keeps a hefty portion of the money that's actually gone into the system.

I'd prefer cash without a middleman, so please use http://gittip.com/ instead, which allows knowledge/content creators to become more financially independent overall (giving us more time to answer your questions).