The creative-commons licenced access point location database.
deploy 208:359b9e80e191
Search by network name: homenetwork
or by MAC address: 00:01:0a:22:3f:a1

There are 63617 observations in the database.
Mostly recently "SeeThrough Web" was observed at

To configure firefox, go to about:config and edit geo.wifi.url to be ""
To configure opera, go to opera:config and edit Location Provider URL to be ""

See geolocation in action by looking up your location.

Sourcecode is available at