Being a small business owner, I’m stoked that this nifty little device has come to market. Square uses the headphone jack on your iPhone and allows you to be able to swipe a customer’s credit card on the spot. All that you need is a wifi signal and the customer can sign with their finger and have the receipt sent to their email. Here, here, for the abstraction of currency! Because when you come right down to it, carrying actual money with you is such a hassle… hear that Cliff Cafe?! Found via Uncrate.