Customers who have been waiting patiently for their Square card reader are getting their devices after a recent hiatus. A posting on the Square Blog by Jack “twitter founder” Dorsey, had said that it was being held for business case rather than technical reasons. Something that will come as no surprise to anyone in the Mobile Money Business.

Those issues are presumably resolved and the device is now being sent out to American customers. The Square Device reads the magnetic stripe on credit cards and plays it as audio tones into the socket for the headset microphone on a mobile phone. Applications for the iPhone and Android devices allow it to be used as a point of sale terminal for credit cards.

There is a promotional video for the Square on youtube

http://www.youtube.com/watch?v=iBieYjxUj5Q

Jack Dorsey has been announced as a keynote speaker at the 2011 Mobile World Congress.