Titles in category in sidebar – 1 post showing

Hi all,

In the main content div of my page I have the following:

<?php query_posts('category_name=homily'); ?>

<?php if ( have_posts() ) : while ( have_posts() ) : the_post(); ?>

<div class="post">

<h2><?php the_title(); ?></h2>
<?php the_time('F jS, Y'); ?>

<?php the_content(); ?>
</div>

         <?php endwhile; else: ?>
         <p>Sorry, no posts matched your criteria.</p>
         <?php endif; ?>

which shows all the posts in the “homily category”. What I really want is for it to show only the latest post, and then to have a sidebar div with titles of the posts in that category. I want the user to be able to click the title and read that particular post in the same page. Is what I’m looking for possible without the need to create a theme?

Thank you,

Sepehr