3. farcebook knows exactly where you are, how is not known yet
Last Location. Shows the last location that facebook got from you. It is unclear how facebook is gathering this information. They might be a mixture of check-ins, data gathered from apps (e.g. on the iPhone), pictures that are geo-tagged, events you have visited, or the location of the last used IP address.
Time 2011-04-16 18:51:27 UTC
Altitude Accuracy -1