есть Stand Alone member list (Список пользователей)
http://eeclub.ru/forum/viewthread/15/
{exp:query sql="select member_id, avatar_filename, avatar_width, weblog_id, avatar_height, username, total_comments,
total_forum_posts, join_date, url, screen_name, last_visit from exp_members order by member_id asc" limit="10"}
как вывести их random?