USA and all the states for now, but I also do not need the counties/states/districts in other countries. I am developing a vacation site and I just need to use the maps for drilling down to the search page. World > USA > Florida or World > Carribbean Islands > Antigua for example. My plan was to build something similar to the map search on these sites
http://www.luxuryrealestate.com
or like this
http://www.luxuryretreats.com/destinations/index.aspx
.. but to go one level deeper with the states