OneCategory.php

<?php
/*
Template Name: OneCategory

  **  Create a Page and assign this template.  Create a Custom Field
  **  named 'category-to-show' and assign it the name of the category.
  **
  **  Any sticky posts in the category will be shown before others.
  **
*/
?>
<?php global $more; $more = 0;?>
<?php get_header(); ?>

<div id="content"><!-- file:OneCategory.php -->
<div class="post";?><h2><?php the_title(); ?></h2></div>
   <?php $this_cat=get_post_meta($post->ID,'category-to-show',TRUE);
        if ($this_cat != "") {
         $paged = get_query_var('paged');
            $stickies = get_option('sticky_posts');
            $args = array( 'category_name' => $this_cat, 'paged' => $paged,);
            if (!$paged) {  // Only show stickies on first page
                $myquery_hold = $wp_query;
                $args['post__in'] = $stickies;
                query_posts($args);
            $found_posts = 0;  // Use this to not show warning if only stickies
            if (have_posts()) {++$found_posts; bmc_show_category($nav=false);};
            unset($args['post__in']);
            $wp_query = $myquery_hold;
         }
         $args['post__not_in'] = $stickies;
         query_posts($args);
         if (have_posts()) {
            bmc_show_category($nav=true);
         } elseif (!$found_posts) {
            echo "<h4></h4>There are no posts in this category $this_cat<h4></h4>";
         }
      } else {
         echo "<h4></h4>This page is missing the Custom Field 'category-to-show'".
         "whose value is the name of the category to be shown." .
         "<br />Please have the page corrected.";
      } ?>
</div><!-- content -->

<?php get_footer(); ?>
<?php function bmc_show_category ($nav = true) {
   global $mam_global_post_link_args;
   while (have_posts()) : the_post(); ?>
      <div class="post" id="post-<?php the_ID(); ?>">
      <hr /><h2><a href="<?php echo htmlentities(add_query_arg('stayincat',get_query_var('cat'),get_permalink())) ?>" rel="bookmark" title="Permanent Link to <?php the_title_attribute(); ?>"><?php the_title(); ?></a></h2>
      <?php if (!is_sticky() && (is_category('ForSale') || is_category('WantToBuy'))) {
         echo '<p>Ad placed on ';the_time('F jS, Y');echo '</p>';
      } ?>
      <div class="entry">
        <?php $mam_global_post_link_args =
                            array('stayincat' => get_query_var('cat'));
          ?>
         <?php the_content(' (more...)'); ?>
      </div>
      <?php if ($nav) { ?>
         <p class="postmetadata"><?php the_tags('Tags: ', ', ', '<br />');
         ?> Posted in <?php the_category(', ') ?> | <?php edit_post_link('Edit', '', ' | '); ?>
         <?php comments_popup_link('No Comments &#187;', '1 Comment &#187;', '% Comments &#187;'); ?>
         </p>
      <?php } ?>
      <?php  echo "<a class=\"pageprevlink\" href=\"";
         the_permalink();
         echo "\"> Comment or Reply </a>";
      ?>
      <?php $mam_global_post_link_args = ''; ?>
      </div>
   <?php endwhile; ?>
   <?php if ($nav) { ?>
      <div class="navigation">
      <div class="alignleft"><?php next_posts_link('&laquo; Older Entries &laquo;') ?></div>
      <div class="alignright"><?php previous_posts_link('&raquo; Newer Entries &raquo;') ?></div>
      </div>
   <?php } // End of if $nav ?>
<?php } // End of Function bmc_show_category ?>