Wi-Fi finders can save those seeking wireless connectivity on the road a lot of time. In mere seconds, you can scan for the presence of an 802.11 network without having to boot up your laptop. The first generation of hotspot locators looked like little fobs that you could clip onto a key ring. When you pushed a button, the device would scan for an 802.11b/g signal, and the device’s LEDs would indicate the presence and strength of a wireless network. Unfortunately, with the limited number of LEDs (usually just four), all you could really surmise was whether there was a network and then get a very general sense of its signal strength.