The television and advertising industries want to make like the Internet and microtarget households. Here's how Twitter is trying to help them reach their goal (and make itself some money in the process).
The startup MC10 makes sensors that alert race-car drivers—and crews—when it's time for a pit stop. "G-forces, temperatures—our technology will survive all of these things," cofounder Ben Schlatka tells us. Will hospitals and the military take to the tech, too?