What's the proper way to get the nid of the next node in a subqueue?

well, if anyone is interested, here's my take on this. any and all feedback welcome.

/**
 * Get the next nid for a node in each subqueue it belongs to
 * If node is the last node in subqueue, return first node
 *
 * @param object $node a fully loaded node object
 *
 * @return array of arrays, one for each subqueue the node belongs to
 * If a node belongs to. if the node belongs to multiple subqueues, it is up to the caller to determine
 * which one to use
 *
 */
function nodequeue_get_next_nids($node) {
  $qids = nodequeue_get_all_qids(0);
  $queues = nodequeue_load_queues($qids);
  $subqueues = nodequeue_get_subqueues_by_node($queues, $node);
  if (! empty($subqueues)) {
    $nextNodes = array();
    foreach ($subqueues as $key => $subqueue) { 
      $nextNodes[] = _nodequeue_get_next_nid_by_subqueue($node, $subqueue);
    }
    return $nextNodes;
  }
}

function _nodequeue_get_next_nid_by_subqueue($node, $subqueue) {
  $position = nodequeue_subqueue_position($subqueue->sqid, $node->nid);
  $next_node = array_shift(nodequeue_load_nodes($subqueue->sqid, FALSE, $position, 1));
  if (empty($next_node)) { //we are at the last node in the subqueue
    $next_node = nodequeue_load_front($subqueue->sqid);
  }

  return array(
    'sqid' => $subqueue->sqid,
    'nid' => $next_node->nid,
  );
}