Submin provides a Web-based admin interface to your subversion repositories. Its features include user/group management, path permission management, and the ability to create svn repositories. It uses htpasswd/svn authz for authentication, so it can use the same login information as apache2/svn (and trac). It works with FF3, IE7, Safari 3, Chrome, and Opera 9.
http://supermind.nl/submin/
http://supermind.nl/submin/