Researchers at the MIT Media Lab's MIThril project propose a solution to "the social and safety problems" associated with cell phones. Specifically, they are designing a prototype phone that can determine the user's circumstances or context, so the phone can respond appropriately. This "context aware phone could automatically switch profiles when the user enters a restaurant, sits in the driver's seat of a car, etc." A CVS repository includes the code used (which is covered by the GNU GPL license) while other pages offer tutorials and other information on their "wearables research" if you're willing to dig a little. This site is also reviewed in the January 30, 2004 _NSDL MET Report_.