Last Updated Jan 12, 2011 11:42 AM EST
GeoRing for the iPhone is a 99 cent app that can track the location of the phone every time you place an outgoing call. You can review these locations on Google Maps afterward.
If you equip all of your road warriors with this tool, you can assess where they are through the day as they place calls.
Another option, available for free: Using MobileMe, you can track the location of all your iPhone-equipped employees throughout the day.