Beginning with "Bridge of Hope", I created a new custom "loop" that includes the timestamp and post/page thumbnail capabilities.
I have been planning to go back through the designs I have already converted and upgrade them with all the new features and functions I've created, but so far there's been more demand for conversion of new designs and plugins, so I've been focused on that.
As a temporary solution, if you edit "loop.php" and add the following code to wherever you want the date to appear, it should work until I'm able to do an official update:
<?php echo '<div class="post-date">' . get_the_time('F j, Y', $post->ID) .'</div>'; ?>