Mailman lists that are not part of groups ?

So the function

function _mailman_groups_getlists() {
  $access = array();

  // Values used to check against the "hide" field.
  $hide_by_member = is_callable('og_is_group_member') ? 1 : 0;
  $hide_by_domain = is_callable('og_abt_domain_group_in_domain') ? 2 : 0;

  // Process group->list relationships...
  $result = db_query('SELECT * FROM {mailman_groups}');
  while ($link = db_fetch_array($result)) {
    // Extract ($gid, $lid, $hide)
    extract($link);

    if ($access[$lid]) {
      continue;
    }
    elseif (!$hide) {
      $access[$lid] = TRUE;
    }
    elseif ($hide == $hide_by_member && og_is_group_member($gid)) {
      $access[$lid] = TRUE;
    }
    elseif ($hide == $hide_by_domain && og_abt_domain_group_in_domain($gid)) {
      $access[$lid] = TRUE;
    }
  }
  return $access;
}

returns an array of lists and whether the user has access or not to each list in the array. But, if there are lists that are not handled by mailman_groups, they will also be hidden because they will not be in the mailman_groups table. Only lists that have been linked to groups are in the mailman_group table, but we still want non-group lists to show up in the form for users to subscribe / unsubscribe.