public function getDefaultFeed($max = 25)
 {
     $feed = new sfRssFeed();
     $feed->initialize(array('title' => 'Cothink Feed for ' . $this->getFullName(), 'link' => 'http://www.cothink.org/', 'authorEmail' => $this->getPrimaryContactInfo()->getEmail(), 'authorName' => $this->getFullName()));
     $events = HistoryEventPeer::retrieveByUser($this->getUserId(), $max);
     // TODO: Allow user to configure max
     $eventItems = sfFeedPeer::convertObjectsToItems($events, array('routeName' => '@permalink'));
     $feed->addItems($eventItems);
     return $feed;
 }