mod_psldap is an Apache module for leveraging LDAP services built on the OpenLDAP library and the Apache APIs, to include web based A&A, web based updates to the LDAP store, server-side XSLT processing, and session management across servers.
This is a php/ajax application that lists groups on a Leopard Mac OS X Server Open Directory. The user can then choose a group to manage and add or remove members to the group.