Previously I talked about Google Latitude and how you can see the location of your friends using GPS (if available) or estimates using cell phone towers.
Something I did not mention before was Google does give you some privacy when using Latitude. You can allow your phone to automatically detect your location, or you can set your location manually or just hide where you are.
Latitude isn't usually exact (as you can see with the blue shaded in area on my Latitude example above) but it really depends on where you are and what phone you are using. None the less, it gives you a pretty good idea as to where the people are. The three people I have on Latitude all have the same Blackberry Curve through either Bell or Telus so it typically gives a range within a kilometer or 2 or 3 of where they are. Last week on a trip down to Montague Latitude was showing exactly where we were because there is less obstructions blocking my Blackberry from reaching the GPS satellites.
Above Map Taken From iGoogle
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