PlaceLab. It’s some kind of Intel sponsored GPS clone which works via wifi. Darned if I can figure out why though, especially since there are so few wifi spots in relative global terms.

‘Place Lab is a software base and a community-building activity that facilitates widespread adoption of low-cost, easy-to-use user positioning for location-enhanced computing applciations…The key motivation for Place Lab is the widespread proliferation of WiFi technology…Place Lab allows clients to determine their location entirely privately without constant interaction with a central service…’