A friendly offer, but I demurred. Anonymous geoshagging is not what I had in mind when I imagined what the GPS revolution could mean to me. The location-aware future—good, bad, and sleazy—is here. Thanks to the iPhone 3G and, to a lesser extent, Google's Android phone, millions of people are now walking around with a gizmo in their pocket that not only knows where they are but also plugs into the
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