One moment it's a phone in your hand. The next, it's a full-fledged turn-by-turn nav unit with an active internet connection. What happened? These apps, is what.
It's uncanny. When known software gets repackaged for iPhones and iPod Touches and passes through the hallowed gates of the App Store, something happens: Almost invariably, it gets cheaper. Waaay cheaper. Good right? Well, not always.