This raises some serious privacy issues. But where better than to work these concerns out but on a research campus?

With these maps, you can see down to the room on campus how many people are logged on. You can even watch someone go from room to room if they have a handheld device that's connected.

This participatory act aims to engage them in the issues of social networks and distributed interaction, but also on the possible drawbacks of limited privacy and geographical surveillance.

raises a variety of antitrust concerns.

Like a tracer running through the veins of the city, networks of air quality sensors attached to bikes can help measure an individual's exposure to pollution and draw a dynamic map of the urban air on a human scale, as in the case of the Copenhagen Wheel developed by new startup Superpedestrian.

Phone networks can capture life on our planet.