Links for other file management interfaces:
Xythos Flash overview: http://tinyurl.com/2hx8ty
Alfresco Flash feature slides: http://www.alfresco.com/products/ecm/tour/tour.html
Magnolia live demo (username/password = superuser/superuser): http://demoauthor.magnolia.info/
(click on the "Documents" tool)
Screenshots of other ideas: List View