Come Friday, and Wikitude produces a new rabbit out of its head. Wikitude Drive is a natural extension to "AR browser" applications, providing on screen directions and augmented arrows you could follow to arrive to your destination. And this time, you don't have to understand my cumbersome description, since the press release was "augmented" with a Youtube clip:
I guess that it's not that useful when driving, but when it comes to walking directions, that's an application I would love to have at hand.
More details, here.