Bitcoins are taking to the streets. Later this year, an ATM called RoboCoin is slated to begin doling out the virtual currency in Vancouver. Bitcoin-enthusiast brothers Mark and John Russell are behind the plan, which will let customers buy and sell the currency for cash. All you have to do is bring your QR code back to a RoboCoin kiosk, scan it, and cold, hard cash will pop out. Bitcoin to cash instantly, cash to Bitcoin almost instantly (consider the three- or four-day waiting period).