Gifts for Geeks

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Wi-Fi Detector Shirt
Wi-Fi signals abound, but they're hard to find without an open laptop or a sign in the coffee-shop window. Now, a T-shirt from thinkgeek.com gives geeks another way to find a hot spot. As its wearer gets within range of a Wi-Fi signal, glowing bars on the front of the shirt light up. When the signal dips, the shirt goes dark. The system is powered by three AAA batteries that slip into a small pocket sewn inside the shirt. Priced at just $29.99, this garment promises to inform and entertain as you walk around campus or the office. The T-shirt is washable: the batteries and the glowing decal are designed so that they can be easily removed before you toss the garment in the washing machine.

Credit: thinkgeek.com

Wireless Christmas Tree
O Wireless Tannenbaum! For those who never again want to untangle the old, knotty, rolled-up ball of Christmas lights, Frontgate, a high-end home-furnishings store, is selling this four-foot Wireless Lighted Artificial Christmas Tree in Urn for $275. The tree isn't completely wireless--you still have to plug a cord into an outlet from its base--but a wireless transmitter in the urn sends out 915-megahertz radio waves with an output of three watts, which is just enough power to illuminate all the LED bulbs hung on the tree in whatever arrangement you desire. The receivers to which the LEDs are attached are part of a system developed by Powercast, a Pennsylvania-based startup, and the Christmas tree is the first product to feature its wire-eliminating technology. What's also nice is that the transmitter powers each LED individually, so you'll never have to worry about one rotten bulb ruining an entire string of lights again.

Credit: Frontgate