[@kawauso Member 15 years, 7 months ago]

<?php $last_post = bb_get_last_post(); ?><a href="<?php echo get_post_link($last_post->post_id); ?>">Latest post</a><?php unset($last_post); ?>

Put that in your front-page.php in the parts you want the latest post link to appear. Try after <?php topic_page_links(); ?>