The experiment has had six months to run its course. A year and a half ago, Apple added GPS hardware to the iPhone 3G, but left out the most obvious piece of software people were expecting: turn-by-turn guided maps. Then, in announcing the iPhone 3GS back in June, Apple helped TomTom debut the first of what would eventually become a large number of third-party turn-by-turn GPS solutions for the iPhone—in essence, programs that bypassed the device’s…
