Keeping frighteningly close tabs on the current locations of your friends, enemies, ex-lovers, bookies, and dealers is one of the hotter trends in the mobile space these days with products like Loopt, Whrrl, and Helio's Buddy Beacon making location-based contact tracking a breeze. Now that Google's getting into the game, though, that business model might start to dry up for everyone else -- especially considering that its so-called Latitude tech will be built into Android going forward and availa
