list

<em><h3 class="postmetadata"><span class="tags">

<?php the_tags( __( ' ', 'twentyten' ), ', ', ''); ?></h3></em>

<div class="entry">

    <div id="list-posts">
    <?php
    global $post;
    query_posts ('cat=1 &posts_per_page=1'); ?>

<div class="post" id="post-<?php the_ID(); ?>">

<?php
//for use in the loop, list 5 post titles related to first tag on current post
$tags = wp_get_post_tags($post->ID);
if ($tags) {
  echo '';
  $first_tag = $tags[0]->term_id;
  $args=array(
    'tag__in' => array($first_tag),

  'showposts'=>20,
    'caller_get_posts'=>1
   );
  $my_query = new WP_Query($args);

  if( $my_query->have_posts() )

 { ?>
<ul style="list-style-type: square; padding-left:10px; margin-left: 10px;">
<?php
    while ($my_query->have_posts()) : $my_query->the_post(); ?>


<li><a href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link to <?php the_title_attribute(); ?>"> <?php the_title(); ?> </a></li>

<?php endwhile; ?>
</ul>
<?php }}?>