Twitter founder Jack Dorsey (http://twitter.com/jack) came up with a new start up, Square (http://squareup.com/). Basically it's a credit card swiper that works with your audio jack on your cellphone. The more you think about how useful that would be the more you think about the ability to bypass major institutions (and their fees). Maybe we could get rid of money altogether and create an online mega database of bartering exchanges. Another mobile money service is Obopay (https://www.obopay.com/), basically a paypal that works from mobile to mobile.
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