In investigating the iPod Touch location services functionality, I came across the Instamapper GPS Tracker app. It was meant to be used with the iPhone and it uses the location service to locate the iPhone and transmit its location to Instamapper where it is displayed on a google map.
I was able to cajole it to run on my iPod Touch (it can buffer up to 100 points) and took my Touch on my walk yesterday morning. I live in Montreal in the NDG area. I walked in NDG/Hampstead. This is the result:
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