Twine is the simplest possible way to get the objects in your life texting, tweeting or emailing. A durable 2.5" square provides WiFi connectivity, internal and external sensors, and two AAA batteries that keep it running for months. A simple web app allows to you quickly set up your Twine with human-friendly rules — no programming needed. And if you're more adventurous, you can connect your own sensors and use HTTP to have Twine send data to your own app.
Get more info and buy Twine at http://supermechanical.com/twine