Wireless power coming closer to reality (abstract of paper, Wall Street Journal story): Researchers at MIT demonstrate lighting a 60-watt bulb (dimly) from over two meters. True, 40 percent power loss, but that's over open space. Commercial products might be a few years away. The short story is that they use a pair of copper coils tuned to the same magnetic resonance so that power is targeted in one place. The technology will work only over short distances, but that might make it possible to charge battery-powered devices by having them just in rough proximity to resonance chargers, or to have battery-free, wireless devices that work only in the vicinity.