WiFisense: wearable WiFi detector
Category: Wireless
A wearable WiFi detector made out of 64 LEDs that light up to alert you whenever you're in range of WiFi:

WiFisense scans for the presence of WiFi (802.11) networks wherever you go. It detects the networks' signal strength, and whether they are password protected (WEP-enabled) or not. When WiFisense finds a network, it uses patterns of light and sound to announce its availability, quality and accessibility.
WiFisense is more of an art project at the moment, but the idea is that you could embed this into laptop bags, jackets, belts, or all sorts of clothing and accessories. Not that we'd be caught dead walking around town wearing something this garish.