It's been a good couple weeks for BlackBerry users. First came Google's new Mobile App, and now there's MapQuest 4 Mobile, a new app that brings the eponymous mapping service to BlackBerry devices.

Suppose you're headed across town to meet with a new client. The directions you got from MapQuest say the trip will take you about 35 minutes, so you plan accordingly. But then you get caught in ...

Five years ago, the most sophisticated in-car navigation system displayed roads and street names, using GPS to locate a vehicle within a few yards and provide mostly reliable turn-by-turn driving ...