Like many of you, I'd imagine, I have at least three old Palm Pilots scattered about my place, collecting dust in drawers and boxes. I just never got into the habit of using one regularly. But all still work, so I've started hunting for alternate uses for them. Look for something in the May issue on this, but as a preview, here's one of my favorites: A kit from Carnegie Mellon's Robotics Institute for a fully autonomous robot that uses the Palm as a brain. It even has optical sensors to get around walls. Seems like a great way to get started on robotics projects. —Mike Haney
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.