Surprisingly, this worked. Instructables member tm36usa glued a USB WiFi adapter on the inside of a metal food steamer and mounted it on a tripod. The steamer functions as a parabolic reflector, capturing WiFi signals:
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Just plug the USB WIFI adaptor into the socket on the dish and plug the other end into your computer. Enjoy boosted signal strength and improved distance. Fire up Netstumber or Kismet to really see the gain in power. This works even better than I thought it would. Be sure to leave your comments on how well it worked. Works great for war driving too.
-via Hack A Day