I am currently considering the purchase of a TomTom 720 or 730. My intention is to use it to geotag images I take with my digital camera during my vacation or day trips. In what format does TomTom save the track log file? Is it the common .gpx format or does TomTom use it's own track log file format? Has anyone had success converting the TomTom format to .gpx using GPS Babble? Is there a limit to size of a TomTom track file? If so, should I start a new track log file every 4 or 8 hours? Thank you for your assistance.