The Canary Wireless Hotspotter is a $50 WiFi detector with an LCD readout that shows the name, WEP status and signal strength of the 802.11g and 802.11b networks it finds. This is what's been missing from traditional WiFi detectors (which only light up to indicate the presence of 2.4GHz radio emissions, which can also come from microwave ovens, cordless phones and walkie talkies). I'm not sure how sensitive the antenna is in this thing — antenna sensitivity is key: you don't want an overly sensitive device that shows you networks that are not in range of your laptop's WiFi, but neither do you want an weak antenna that misses networks your WiFi card could use.
(via Red Ferret Journal)
