WiFi-detector shirt, which will simultaneously inform passerby that a WiFi network is nearby and that they probably don't need to speak to you. The detachable detector / display combo runs off three AAA batteries for "hours" -- just long enough for you to alienate the locals before heading back to your parents' basement. Scarily enough, it's already out of stock, but ThinkGeek should have more in a couple weeks for $30.
Animated WiFi detector shirt keeps you single with signal
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