Here's how one theme (Identification Bands by Neuro) does something similar with comments. I don't know what you'd need to change exactly to show trackbacks and pings instead, but it shouldn't be too tough.
<?php
global $comment;
if ( $comments = $wpdb->get_results("SELECT comment_author, comment_author_url, comment_ID, comment_post_ID FROM $wpdb->comments WHERE comment_approved='1' ORDER BY comment_date_gmt
DESC LIMIT 5") ) :
?>
<h2 class='coltitle'><?php _e('Last Comments'); ?></h2>
<ul>
<li>
<ul>
<?php
foreach ($comments as $comment) {
echo '<li>' . sprintf('%s <span style="text-transform: lowercase;">on </span>%s', get_comment_author_link(), '<a href="'. get_permalink($comment->comment_post_ID) . '#comment-' . $comment->comment_ID . '">' . get_the_title($comment->comment_post_ID) . '</a>');
echo '</li>';
}
?>
</ul>
</li>
</ul>
<?php endif; ?>