comments.php

<div id="comments"></div>
<script src="http://widgets.twimg.com/j/1/widget.js"></script>
<link href="http://widgets.twimg.com/j/1/widget.css" type="text/css" rel="stylesheet">
<script>
new TWTR.Widget({
  type: 'search',
  search: '<?php echo $post_link ?>',
  id: 'comments',
  loop: false,
  subject: 'Comments',
  width: 600,
  height: 300,
  theme: {
    shell: {
      background: '#fff',
      color: '#404040'
    },
    tweets: {
      background: '#fff',
      color: '#404040',
      links: '#303030'
    }
  }
}).render().start();
</script>

post.php

<article class="single">
    <div class="row">
        <div class="one-quarter meta">
            <div class="thumbnail">
                <img src="<?php echo $post_image ?>" alt="<?php echo $post_title ?>" />
            </div>
            
            <ul>
                <li>Written by <?php echo $author ?></li>
                <li><?php echo $published_date ?></li>
                <li>About <?php echo $post_category ?></li>
                <li></li>
            </ul>
        </div>
        
        <div class="three-quarters post">
            <?php echo $post ?>
                                
            <ul class="actions">
                <li><a class="button" href="https://twitter.com/intent/tweet?screen_name=<?php echo $twitter ?>&text=Re:%20<?php echo $post_link ?>%20" data-dnt="true">Comment on Twitter</a></li>
                <li><a class="button" href="https://twitter.com/intent/tweet?text=&quot;<?php echo $post_title ?>&quot;%20<?php echo $post_link ?>%20via%20&#64;<?php echo $twitter ?>" data-dnt="true">Share on Twitter</a></li>
                <li><a class="button" href="<?php echo $site_url ?>">More Articles</a></li>
            </ul>
            
            <?php
                /* do twitter comments stuff */
                include('comments.php');
            ?>

            <script>!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0];if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src="//platform.twitter.com/widgets.js";fjs.parentNode.insertBefore(js,fjs);}}(document,"script","twitter-wjs");</script>
        </div>
    </div>
</article>

style.css

/* this line needs to be added to your /template/style.css file to keep 
the twitter widget from overlapping on top of the action buttons */
#comments.twtr-widget {
    position: static; /* this is for the commenting system */
}