Intel's Investigations In Location-Aware Computing

This article about location-aware computing suffers from the usual “you’ve entered your entire life into your calendar” problem, and surely a short range network such as Bluetooth would be a better solution to “Enabling the ability to easily share papers and presentations with everyone else in a room, without having to email it or set up a folder on a common server”.

However, it links to some interesting research from Intel where they are trying to unify different location systems (e.g. GPS for wide-area location info, and triangulating WiFi access points for which-room-am-I-in info). I wonder if the databases of WiFi base-stations that are being created so people can find WiFi can be used in reverse for people who have WiFi to find out where they are?