Last Monday I released a first version of Node Page Template.
This little module makes it possible to configure a page template per content type and per node. It also makes a node template suggestions based upon that page template.
Default theme function makes an Node template suggestion per content type and per node, and this adds a Page template suggestion. When 'Default' is selected, there is no additional suggestion.
More information can be found at http://drupal.org/project/node_page