The daily dump archive that used to be hosted in the following link seems to no longer be available:
http://www.nationstates.net/page=archive
Previously archived dumps are no longer accessible either, at least not through the old links. For instance:
http://www.nationstates.net/archive/nat ... ons-xml.gz
As far as I can tell from my logs, the archive has been inaccessible since at least May 26th, 4am ET.
I hope this is a bug and not an intentional change, as the archive was very useful.