Jack Dorsey Demoing Square’s iPhone Credit Card Reader At MacWorld2010

We talked about Square quite a bit in the past couple of months ( here, here, here and here ). In this video, Jack Dorsey founder of Square and co-reator of Twitter, is demoing the service at MacWorld 2010. Here is something we didn’t know about Square: You can plug-in the Square dongle into your MacBook or iMac , anywhere you want , not just into your iPhone or iPod Touch.