Prosumer, enthusiast, advanced amateur. Whatever you call it, there is a class of photographers who are not pros but are serious about picture taking -- committed enough to spend a grand or more on an SLR body and at least several hundred dollars more on lenses. Those shutterbugs recently got two new choices from the big guns of digital photography. In September, Nikon released its veeeeerrrry long-anticipated D90 (a winner in our latest Best of What's New honors).
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.