Is there any program that can access the wiki page files directly and extract them putting them onto the new wiki site? Would want to save this way as a sort of last resort due to the time and energy involved with it.
If you really want to go this route, see http://www.mediawiki.org/wiki/Manual:Database_layout and http://www.mediawiki.org/wiki/Manual:Page_table
But as this is a relational database with lots of interdependencies this might not be a feasible way to go.
You can use phpMyAdmin (http://www.phpmyadmin.net ) for direct manipulation of database tables.