whatcd_notification_count_title.user.js

// ==UserScript==
// @name           Notifications in title
// @namespace      tobbez
// @description    Notifications in title
// @include        http*://*what.cd/*
// ==/UserScript==

(function () {
  var re = /You have (\d+) new torrent notifications/
    , orig_title = document.title;
  function set_title (doc) {
    var res = re.exec(doc);
    if (res.length > 1)
      document.title = orig_title + ' (' + res[1] + ')';
  }
  function update_count () {
    var xhr = new XMLHttpRequest();
    xhr.open('GET', document.location.protocol + '//' + document.location.host,
             false);
    xhr.send(null);
    set_title(xhr.responseText);
  }
  set_title(document.getElementById('alerts').innerHTML);
  setInterval(update_count, 600000);
})();