Kensingston have a WIFI Finder which I know my colleague Bernie Goldbach would love to get his hands on.
As the blurb from the kensington site points out
* No more booting up notebook to find a WiFi signal
* Detects most available WiFi networks with the press of a button
* Three lights indicate signal strength
* Compact and lightweight design fits in pocket
* Detects 802.11b and 802.11b/g signals up to 200 feet away
* Filters out other wireless signals
* No software or computer required
29 Nov 2004
WIFI Finder – keyring detector
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