I am concerned that there appears to be no paging in the admin section of this plugin. What's going to happen in a site with thousands of pages in this list? at the moment I see a long list of mixed pages and posts in apparently date order.
The concept of a meta background is very useful but it would be better to show the background settings in the edit pages of each post/page and not a central page list as it is at present. Easier to manage and no long page admin queries.
As a first release this is good, but to be useful it needs better backend management. Thanks for the plugin, please continue to improve the backend.