How often have you woken up tired, devoid of any true energy until you have had your first cup of brew? It seems that this happens simply because you woke up at the wrong time, according to your body. The Sleeptracker Watch aims to help you wake up at the time when your body is most alert and ready to start the new day. The Sleeptracker simply monitors your bodily state while you sleep. You give it a window of time that you would like to wake up, say, between 5:30-6:00 am. The watch will then wake you up at the most convenient time during that window, where your body is not in a deep slumber, but rather a "light" sleep. It even records your sleep data, for your own viewing pleasure at a later time.

Edit: Looks like these guys are off to a great start!