Research center developing sensor technologies relevant to in vivo research

The popularity of in vivo studies (where data about people's activities and health status are captured while people go about their daily lives -- that is, while in vivo) will flourish as inexpensive devices are systems are made available to automate data capture as much as possible. You don't want to ask people to stop what they're doing to take their pulse and blood pressure. The best systems will be those that unobtrusively just record these data, with minimal intervention. Technologies and apps are increasingly appearing to take advantage of the sophisticated capabilities and sensors (camera, accelerometer, gyro, etc.) already built into the most popular smartphones!

The Center for Embedded Networked Sensing (CENS) is a research center at UCLA working on all sorts of different sensor technologies. They're not all health-related (many are environmental sensors) but I don't see any reason why the technologies they're developing can't be applied for in vivo research.