A new service by the co-founder of Twitter aims to encourage small businesses to accept digital transactions by allowing them to swipe credit cards using a smartphone.
It's called Square, and it works with a one-two punch of a free mobile app (iPhone/iPod/iPad, Google Android) and a little plastic cube that plugs into the audio jack of your device.
The service turns anyone with a smartphone into a debit and credit card-accepting small business. So that time you wanted to sell your old gaming rig on Craigslist, but couldn't get someone to pay in cash? Square would fit the bill.
Want to know how it works? Head over to SmartPlanet's Smart Takes blog for the full scoop.