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(Related Gallery: 20 of the coolest gadgets and must-haves for your office: Part 1)
Ladies and gentlemen, here it is: the solar-powered Electree! Basically, it's a miniature tree filled with tiny solar panels that, when set in front of the sun, will act as a charging station for a small USB device that you hook to it (think "cell phone," "iPod," or something similar). Unfortunately, they're pretty pricey at ~$400, but fear not! There are a couple of gadgets to come in this gallery that blow this one out of the water cost-wise.