With this SD (Secure Digital) flash-memory card, you can move photos, songs or any other files from your device to your computer without cables or a separate card reader. Just stick the built-in USB plug directly into your computer. $80 (512MB) or $135 (1GB)
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.