Glam Speed is a cool simple speedometer for iPhone that uses the location data from the GPS in iPhone 3G to provide a near-accurate representation of how fast you're actually traveling.
Featuring fashion graphics, Glam Speed is the perfect bicycle, boat or train speedometer.
Glam Speed can display the speed in Km/h or Mph: choose your favorite tapping on the small round button at the bottom of the console.
As this works using the GPS, you will have to be moving at a certain minimum speed for it to register, and from testing it seems to be 5km/h. Ergo walking won't normally make the dial update unless you have super-accurate GPS coverage. Using GPS, you must use Glam Speed outdoor.
iPhone 3G is required for this application.