Back in the day, say 2004 or 2005, some far-seeing folks tried to set up virtual currency exchanges. Traffic was too light at the time, but now it seems to be a sustainable business model with some venture buy-in. See this article in Forbes. Here's the skinny: The exchanges stand ready to transfer balances in either direction for a large number of currencies, including $. It's a natural next step in the evolution of this space. When there were a zillion European currencies, banks made a lot of money just helping you switch from one to another. "If it's Drachma,...