I lent the Sony GPS to my friend Sean Hartnett, who is a photographer and marathon correspondent for Track and Field News and The Kenyan Athlete.  At the NYC Marathon, he was on a lead vehicle photographing the elite men.  The GPS worked!  Watch the slideshow below or click through to see the photos geotagged in Picasa. All photos copyright Sean Hartnett, 2007.

Click here to see Sean's photos on a Picasa Google Map: