Modify Page Title before output via wp_page_list

Very crude way of doing it:

<?php
$children = wp_list_pages("title_li=&child_of=".$post->ID."&echo=0&exclude=&depth=1");
$children = str_replace("Intro", "Special", $children);
?>

Or alternatively you can look at using the new menus feature in WordPress 3.0. Build up you menu of pages, and in there you can assign a different menu name to the page title.

http://en.support.wordpress.com/menus/