Today's newspaper had a small piece of news at the science pages telling that neurophysiologist and engineers have together created a new innovation for mobile terminals. The idea is that smartphone will wake you up when your sleep is the lightest and only a small signal is needed to wake you up. Software records the sounds you make when you are sleeping and does statistical analysis to determine when is the best time to wake up.
I haven't tested the application and I don't know more about it, but I like this innovation that combines medical research with smartphone development and claims to solve an everyday problem.
Application's homepage can be found here.