PC World - Looking for a new way to detect Wi-Fi Hotspots? Ty Liotta over at ThinkGeek has come up with yet another way to detect Wi-Fi with a T-Shirt. The shirt has glowing bars on the front that light up in waves when there's a 802.11b or 802.11g network in range, it can't tell if the signal in range is open or encrypted, and can't detect the new Wi-Fi technology 802.11n Draft 2.0. The shirt takes three AAA batteries, and is only available in black. It is 100% cotton, and is washable after carefully peeling the animated decal from front of T-Shirt, unplugging the ribbon connector behind decal and remove decal, unplug battery pack and remove it, machine wash gentle cycle on cold, hang to dry. The shirt is available now and cost $29.99.