I originally posted this to the Complementary Currencies discussion group on Skype in response to a question from Christoph Hensch. But it probably merits inclusion here.
Christoph, I believe we are in the lazy habit of thinking that the flow of the currency itself is the one that matters instead of the actual flow of goods, services, resources, knowledge or participation which flows COUNTER to an exchange currency.
Those real-world currents shaped and enabled by currencies are what make them so valuable and powerful.