Using Corrade's group membership tracking abilities we can derive a HTTP template that will display members as they join or leave a Second Life group. Furthermore, Corrade tracks members over restarts such that if Corrade is offline and misses members joining and parting, they will be reported once Corrade is back online.
The template binds to the membership notification such that a PHP script receives avatars that have joined or parted the group. The PHP script then stores them in a log-file on the server. Periodically, the client-side HTML component retrieves the log file using AJAX and displays the log file in a textarea.