i think this should be in global layout.phtml

give array of message type ( success, error ), and other if necessary.
for example, when Album deleted, we create a message like this :

     $alert['type'] = 'success';
     $alert['bold'] = 'Success: ';
     $alert['messages'] = array();
     $alert['messages'][] = 'Deleted album number ' . $id;

and set to flashMessenger :  

    $this->flashmessenger()->addMessage($alert);

Next, register the flashmessenger into getViewModel() variable 

    use Zend\Mvc\MvcEvent;
    
    class Module
    {
        public function onBootstrap(MvcEvent $e)
        {
            $eventManager   =    $e->getApplication()->getEventManager();
            
            //load Alert
            $eventManager->attach('dispatch', array($this, 'loadAlert'), -4);
        }
        
        public function loadAlert(MvcEvent $e)
        {
            $flashMessages = $e->getTarget()->flashMessenger()
                                    ->getMessages();
            $alert = array();
            if (!empty($flashMessages)) {
                $e->getViewModel()->setVariables(array(
                    'alert' => $flashMessages[0] 
                ));
            } 
        }
    }

ok, let's get it from the layout :
    <?php if ($this->layout()->alert) : ?>  
        <div class="alert alert-<?php echo $this->layout()->alert['type']; ?> fade in">   <!-- alert type : error or success -->
            <a class="close" data-dismiss="alert">x</a>  
            <i class="icon-<?php echo $this->layout()->alert['type']; ?>"></i>
            <strong><?php echo $this->layout()->alert['bold']; ?></strong>
            <?php if (count($this->layout()->alert['messages']) == 1) : ?> <!-- if message = 1 -->
                  <?php echo $this->layout()->alert['messages'][0]; ?>
            <?php else : ?>   <!-- if message > 1 -->
                  <ul> <!-- looping messages -->
                      <?php foreach($this->layout()->alert['messages'] as $row) : ?>
                            <li><?php echo $row; ?></li>      
                      <?php endforeach; ?>
                  </ul>
            <?php endif; ?>
        </div>
    <?php endif; ?>

I'm try that and get something like this with twitter bootstrap : 
![Screen Shot 2013-03-18 at 12 23 15 AM](https://f.cloud.github.com/assets/459648/268362/0a71e2ac-8f27-11e2-979b-07a6008252cc.png)