So, Square has arrived at another phase of rollout these days. It is now available to everyone who is interested in mobile payments. You should know that it works on the iPhone, iPod touch, iPad, and Android devices.

In case you are not familiar with Square, Square is an application that allows anyone to accept payment cards using their mobile device. This is done with a tiny card reader that plugs into the headphone jack on the device. Unfortunately, Square is unavailable outside U.S. for the time being.

Square intends to bring immediacy, transparency, and approachability to the financial world. We want to enable all people to accept payments instantly, with access to all the information they need, in a way that feels amazing and engaging.  When you think about it, paying someone is just another form of communication, an exchange of value that deserves to have the same design and product considerations that every social service prides itself on maintaining.

Square is, in my opinion, a very interesting and innovative technology and I am really looking forward to see how this turns out. Have you tried Square? What do you think?

You can follow @Square on Twitter.