Smartstones Communicate by Gesture

I see that the startup SmartStones, which I have been communicating with for some time,  has launched.  More here and participation information.   " ... Smartstones Touch is a wearable, sensorial device that let you send messages with simple gestures.  .... Smartstones Touch is the world's first nonverbal communication and sensing platform designed to enhance your daily life. It is a little stone that will empower you to connect with your world through nonverbal communication.  .. "