SKYHOOK: GPS without Satellites

David Pogue - Eye-Fi Review from mshean on Vimeo.
Combining the unique benefits of GPS, Cell tower triangulation and Wi-Fi Positioning, mobile consumers no longer have to wait minutes for a response or cope with inaccurate location.

Finally, a location-system that delivers the same level of location quality whether indoors or outdoors, in the country or downtown.
SKYHOOK