From MobilePipeLine.com Positioning system uses Wi-Fi, not satellites
Skyhook Wireless Monday launched a positioning service that uses Wi-Fi instead of satellites, which it claims will be simpler and less expensive in many environments
The company said that the old GPS systems required separate hardware and line-of-site access to satellites. Such systems also are unreliable in some urban aras, according to Skyhook. The WLAN-based location system eliminates those problems
"With the market set to explode, the applications for Wi-Fi positioning software are endless including search and recovery, E911, proximity advertising, and fleet management,". Skyhook's CEO Ted Morgan said in a statement.