TRENDnet TEW-429UB - 54Mbps 802.11g Wireless USB 2.0 Adapter w/ HotSpot Detector $51.99

The 802.11g Wireless USB 2.0 adapter combines features from Wi-Fi detectors and standard 802.11g wireless adapter to deliver the perfect solution for mobile users. It has built-in LCD display helps you determine an access point's security scheme (WPA, WEP), signal strength, and wireless standard (802.11b or 802.11g) without turning on your laptop.

Buy.com is carrying this 54Mbps 802.11g Wireless USB 2.0 Adapter w/ HotSpot Detector for $51.99