I saw this mobile app a few months ago and rediscovered it recently.
It’s called Waze (they have iPhone, Android, Blackberry, and Nokia versions) and basically what it allows you to do is get real-time traffic and route information from OTHER drivers on the road.
Meanwhile, your phone (anonymously) is contributing information about your speed as well to the service.
So, in essence, we all benefit because we all are telling the network “here’s how fast the traffic is moving on this road at this time” (thanks to GPS, the phone knows where you are.)
I just think it’s pretty neat and potentially a lot more reliable.
Perfect example of the Mesh, btw.