I had a particular time in mind I wanted to beat. I fired up MotionX GPS on my iPhone when I started out (good thing, too, because I forgot to reset my Trip2 odo until I was on the freeway):
Once on the road, however, I quickly realized that the Texas freeways I would be taking were anything but superhighways. Lots of 35mph zones heading out of Austin, a plethora of patrol cars, a stop at the ATM machine and a chocolate hostage that cried for release resulted in a 46mph avg during the first 63 miles.
Here's the progress via MotionX:
Progress on iPhone:
Ah yes--here's how I charge up when my phone has died out on the road and it's what I plugged my iPhone into while running GPS all day: