Render shortcode in WYSIWYG

http://wordpress.stackexchange.com/questions/36568/solution-to-render-shortcodes-in-admin-editor
http://code.tutsplus.com/tutorials/wordpress-shortcodes-the-right-way--wp-17165

Not necessarily the actual Facebook Page Plugin, but at least just replace the shortcode with a placeholder image or something. Needs to be editable on click
