Code snippet for: http://n4.nabble.com/forum/PostLink.jtp?post=1474402

breadcrumbs.phtml

<?php
$n_pages = count($this->pages);
if (0 < $n_pages) {
    echo $this->pages[0]->getLabel();

    for ($i = 1; $i < $n_pages; $i++) {
        echo ' &raquo; ' . $this->pages[$i]->getLabel();
    }

    $last_page = $this->pages[$n_pages - 1];
    if (isset($last_page->demoName)) {
        echo ' &raquo; ' . $last_page->demoName;
    }
}

IndexController.php

<?php

class IndexController extends Zend_Controller_Action
{
    public function indexAction()
    {}


    public function demoAction()
    {
        $page = Zend_Registry::get('Zend_Navigation')->findOneBy('active', true);
        if (null !== $page) {
            $page->demoName = 'Hi, there!';
        }
    }
}