drupal/modules/weblogs.module

<?php
// $Id$

function weblogs_cron() {

  if (db_num_rows(db_query("SELECT nid FROM node WHERE status = 1 AND moderate = 0 AND (created > '". variable_get("weblogs_cron_last", time()) ."' OR changed > '". variable_get("weblogs_cron_last", time()) ."')"), 1)) {
    weblogs_notify(variable_get("site_name", "drupal") ." - ". variable_get("site_slogan", ""), path_uri());
  }
  variable_set("weblogs_cron_last", time());
}

function weblogs_notify($name, $url) {

  $client = new xmlrpc_client("/RPC2", "rpc.weblogs.com", 80);

  $message = new xmlrpcmsg("weblogUpdates.ping", array(new xmlrpcval($name), new xmlrpcval($url)));

  $result = $client->send($message);

  if (!$result || $result->faultCode()) {
    watchdog("error", "failed to notify 'weblogs.com'");
  }
}

?>