The Pages-Children plugin now works with any post or taxonomy type which is setup as hierarchical.
Personally I find the WordPress Pages management somewhat lacking. When dealing with a simple list of About Us, Contact Us, etc. pages the interface works fairly well. But when you have a client who has 15+ levels of sub-pages and each level contains some 50+ pages the interface quickly breaks down in it's usefulness.
So I put together a plugin to help manage this a little better. The new plugin, pages-children, helps to filter the post type or taxonomy list showing only a single level of at a time. That is it really. There is no admin interface or settings. Just through the power of the WordPress actions and filter the page content can be altered. Powerful stuff.
See http://www.codehooligans.com/projects/wordpress/pages-children/