[chrishajer]

You could use the bb_is_user_logged_in() function like this:

<?php if ( bb_is_user_logged_in() ) { ?>

<div id="hottags">

<h2><?php _e('Hot Tags'); ?></h2>

<p class="frontpageheatmap"><?php bb_tag_heat_map(); ?>

</div>

<?php } ?>

You were very close with your guess as to the function name.