Whenever I move into a new house - which is often, as a renter with itchy feet - the first thing I do is look for local wireless networks I can use while waiting to be connected myself. But if I had a third-generation digital WiFi detector, I could scan for networks while looking around a property, and make my accommodation decisions based (partially) on the information in hand.
On the Digital WiFi Detector's back-lit LCD screen is the next generation of wireless information - in addition to bog-standard network availability and strength information, this gadget can tell you all about security status, channel, and SSID, with multi-network scroll-through options. It detects WEP and WPA encryption, runs on (included, yay!) AAA batteries, and can detect wireless networks from 200 feet away.
You can buy the dinky (65mm x 70mm x 24mm) gadget from Think Geek for a mere $69.99, which in pounds is practically free for something so handy.
From: The feminist reading of a perfectly harmless memory device