WordPress-Powered Portfolios: list_work()

<?php 
// http://tylersticka.com/2009/09/wcpdx09/
// Function to display a list of portfolio items
// Same arguments as get_work
function list_work($exclude=null, $limit=-1, $parent=3, $args = array('orderby'=>'menu_order','order'=>'ASC','post_type'=>'page')) {
	// Retrieve a set of work results
	$work = get_work($exclude,$limit,$parent,$args);
	// If work is successfully retrieved, build the list
	if ($work) : ?>
	<ul>
		<?php 
		// Loop through each item
		foreach ($work as $item) : 
		// Grab the item's custom meta
		$fields = get_post_custom($item->ID);
		// Build the list item, with a linked thumbnail and title
		?>
		<li><a href="<?php echo get_permalink($item->ID) ?>">
			<img src="<?php echo $fields['tn'][0] ?>" alt="" />
			<?php echo apply_filters('the_title',$item->post_title); ?>
		</a></li>
		<?php endforeach; ?>
	</ul>
	<?php 
	// If no work is found, display an error message
	else : ?>
	<p>Our apologies, but we have yet to add any examples of our work. Check back soon!</p>
	<?php endif;
}
 ?>