Reality mining and other things I did with cell phones

Earlier this year, the number of mobile phone users exceeded 4 billion – with the majority of users living in the developing world. The implications of this fact are profound: most people on Earth are currently carrying computers that continually transmit information about their relationships, movements, and even financial decisions to closed databases distributed throughout the world. While the privacy implications of this data should not be understated, I believe this ubiquitous infrastructure of wearable computers can be repurposed in ways that better serve both the billions of individuals who carry them and ultimately the societies in which they live.