Google Maps has a nice featured called "My Location" and it can either determine your location based on a GPS signal or via cell phone tower triangulation. In the past, when Verizon used to disable the internal GPS on smartphones, this feature did not work on most older smartphones. I was pleased to find that the cell phone triangulation works on the new HTC Touch Pro2. I tend to use the built-in GPS, so it may not be very relevant. However, I'm inclined to think that I'm getting a faster GPS lock thanks to this cell tower triangulation.
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