JustSpeed is just that a very large speedometer that will work in all positions of the Iphone. Just touch the speed to change color and touch the MPH to change to KPH and back again. Touch the max speed to clear it. The course is also displayed in the bottom center.
** For Even More Options Check Out JustSpeed2**
Rev 1.9
Hud mode added just place your iPhone on your dash and read the speed on your windshield.

Rev. 1.7
Now saves decimal and mph,kph or Knots settings.
Fixed Knots spelling

Email me at markt40@earthlink.net if you have any questions or problems.

Rev 1.6:
Added Lock to Lock the screen in Landscape and Portrait
Added KNOTS
White background with Black text added
Button to add one digit after decimal
New control buttons for backdrop selection


Rev 1.1:
Added Max Speed
Compiled to support iPhone 3G and 3GS  with 2.2.1 and up.

Rev 1.2: 
Color choice and Max Speed are saved when you exit.

Rev 1.3: 
Ability to choose background image from photo albums.
The course text now changes color with all other data.

Rev 1.4:
Improved look and performance
GPS signal strength added
Saves blank screen now
Info button added
Just touch the bottom left edge of the screen to bring up the photo selector. Touch the bottom right to of the screen to remove the photo. 

Just Released Rev 1.5:
Added an Odometer

*Now For iPhone 3G and 3GS firmware (2.2.1) and above Only* If you get this app and it doesn't work you most likely need to upgrade your iphone, or you installed it on an iPod touch which does not have GPS so it won't work!