Jo and I upgraded our iPhones to the new iPhone 3GS. I basically had to after spilling wine on my original iPhone and it finally died for good, with impeccable timing, seeing how the new iPhone just came out. So the new iPhones have GPS and with the application RunKeeper, you can keep track of your runs. It’s very cool. Check this out.
Jo and I basically walk from our condo up to a school a few blocks away and run 3 miles or so on the track. The application keeps track of distance, speed, calories burned, altitude changes, and the duration of the run. You just start the application on your iPhone before you start your run and stop it when your done. The application uploads your data to the web site and you login to view the details. Technology is amazing.