iCloseBy.com has developed a new application called iMarkMySpot, which takes advantage of the iPhone's integrated GPS feature to allow users to "one-touch" Geotag and Geocode photos with exact locations. Stored locations can then be e-mailed to any address as a standard GPX-formatted file.  Locations can then be emailed to any address as a standard GPX-formatted file, which is compatible with many photography and mapping software packages.  You can check out iMarkMySpot at the iPhone App Store in iTunes here.