Those who don't want to carry around their open laptops looking for a WiFi signal will be happy to hear that Kensington is now introducing the WiFi Finder.

The device (2"x3"x.4") is small enough to fit in your hand and comes with a loop, presumably so that you can hang it around your neck(?). Basically, if you push the button, one or more of the 3 LEDs light up showing the signal strength of B or G networks (no A) in the area.

The price appears to be in the $20-25 range (based on a cursory search of the net) and nobody appears to have them in stock.