New York Times:Heads-Up Displays Move From Cockpits to Cyclists' Helmets - Soon recreational motorcyclists and bicyclists will be able to take advantage of data projected into their line of sight.
This is quite similar to a device I was pondering while driving back yesterday. I want to combine GPS and a simple display with a wireless connection for updating road conditions and highway speeds dynamically. If the technology was used to track vehicle speeds like the fleet tracking or reporting from the ever more common roadside speed indicators.
CDOT has a pretty good site but it only does most people good while they are not in their cars but are at their computers.