A Watch You Wear to Bed: Sleeptracker

Do you find it hard to wake up to a normal alarm clock? Do you notice that on some mornings it's harder to rise than others? It's likely that this difficulty arises because a standard alarm clock isn't capable of detecting where you are in your sleep cycle, so it's not possible for it to wake you when you're most likely to be receptive to its tone. The Sleeptracker Pro monitors your body all night long, continuously keeping track of your optimal waking times. In this way, it wakes you up during a window of time that you set at the best possible moment, leaving you feeling awake and refreshed.

The Sleeptracker Pro keeps historical track of sleep data which is sync'ed to PC-based sleep history software (included).

Offers three alarm choices: Vibrating, ringing, or both.

The tough part, I think, is to get used to wearing a watch while sleeping.