How do you get the country/state/region/city/state/zip/postal from GPS coordinates?

Question

I have GPS coordinates on all of my photos. I want to include tags/IPTC data for the city, state, zip, etc.. However all I have is the GPS coordinates. How can I take these and

Answer 1

What about doing reverse geocoding with the Google Maps API?

http://code.google.com/apis/maps/documentation/services.html#ReverseGeocoding