function loadNews() {
  var Cc = Components.classes;
  var Ci = Components.interfaces;
  var historyService = Cc["@mozilla.org/browser/nav-history-service;1"]
                       .getService(Ci.nsINavHistoryService);

  // no query parameters will get all history
  // XXX default sorting is... ?
  var options = historyService.getNewQueryOptions();

  options.resultType = options.RESULTS_AS_URI;
  options.sortingMode = options.SORT_BY_VISITCOUNT_DESCENDING;

  // no query parameters will return everything
  var query = historyService.getNewQuery();
  query.annotation = "ambnews/feed";

  // execute the query
  var result = historyService.executeQuery(query, options);

  var root = result.root;
  root.containerOpen = true;

  var childNum = 0;
  var childrenShown = 0;
  var maxChildrenToShow = 20;
  var shownFeeds = {};

  function getNextFeed() {
    if (childrenShown == maxChildrenToShow ||
        childNum == root.childCount) {
      root.containerOpen = false;
    } else {
      var annSvc = AmbNews.__getAnnSvc();
      var child = root.getChild(childNum);
      var feedUri = annSvc.getPageAnnotation(AmbNews.url(child.uri),
                                             "ambnews/feed");
      childNum++;
      if (feedUri in shownFeeds) {
        getNextFeed();
      } else {
        shownFeeds[feedUri] = true;
        childrenShown++;
        AmbNews.getFeed(feedUri, onFeed);
      }
    }
  }

  function onFeed(feed) {
    var text = "";
    if (feed) {
      var entriesToShow = 4;
      if (feed.entries.length < entriesToShow)
        entriesToShow = feed.entries.length;
      var feedLink = feed.link ? feed.link.spec : "";
      text += ('<div class="feed"><div class="feed-title"><a ' +
               'href="' + feedLink + '">' +
               feed.title.text + '</a></div><ul>');
      for (var i = 0; i < entriesToShow; i++) {
        var entryTitle = feed.entries[i].title.text;
        if (entryTitle.length > 100) {
          entryTitle = entryTitle.slice(0, 100) + '\u2026';
        }
        text += ('<li class="feed-entry"> \u00b7 <a href="' +
                 feed.entries[i].link.spec +
                 '">' +
                 entryTitle + '</a></li>');
      }
      text += '</ul></div>';
    } else
      text = "An error occurred.";
    //$("#content").append(text);
    $(text).hide().fadeIn("slow", getNextFeed).appendTo("#content");
  }

  getNextFeed();
}

$(window).ready(loadNews);