I have something like this in the Loop in my Archive Template. Basically, it shows excerpts from all cats apart from 11, where it just shows title:
<?php if (have_posts()) : ?>
<?php $post = $posts[0]; // Hack. Set $post so that the_date() works. ?>
<?php /* If this is a category archive */ if (is_category()) { ?>
<h2 class=”pagetitle”>Archive for the ‘<?php echo single_cat_title(); ?>’ Category</h2>
<?php /* If this is a daily archive */ } elseif (is_day()) { ?>
<h2 class=”pagetitle”>Archive for <?php the_time(‘F jS, Y’); ?></h2>
<?php /* If this is a monthly archive */ } elseif (is_month()) { ?>
<h2 class=”pagetitle”>Archive for <?php the_time(‘F, Y’); ?></h2>
<?php /* If this is a yearly archive */ } elseif (is_year()) { ?>
<h2 class=”pagetitle”>Archive for <?php the_time(‘Y’); ?></h2>
<?php /* If this is a search */ } elseif (is_search()) { ?>
<h2 class=”pagetitle”>Search Results</h2>
<?php /* If this is an author archive */ } elseif (is_author()) { ?>
<h2 class=”pagetitle”>Author Archive</h2>
<?php /* If this is a paged archive */ } elseif (isset($_GET[‘paged’]) && !empty($_GET[‘paged’])) { ?>
<h2 class=”pagetitle”>Blog Archives</h2>
<?php } ?>
<div class=”navigation”>
<div class=”alignleft”><?php posts_nav_link(”,”,’« Previous Entries’) ?></div>
<div class=”alignright”><?php posts_nav_link(”,’Next Entries »’,”) ?></div>
</div>
<?php while (have_posts()) : the_post(); ?>
<div class=”post”>
<?php if ( in_category(’11’) ) { ?>
<h3 id=”post-<?php the_ID(); ?>”>” rel=”bookmark” title=”Permanent Link to <?php the_title(); ?>”><?php the_title(); ?></h3>
<?php } else { ?>
<h3 id=”post-<?php the_ID(); ?>”>” rel=”bookmark” title=”Permanent Link to <?php the_title(); ?>”><?php the_title(); ?></h3>
<small><?php the_time(‘l, F jS, Y’) ?></small>
<div class=”entry”>
<?php the_excerpt_reloaded(120, ‘
<br><img>’, ‘none’, TRUE, ‘Read the full post >>’, FALSE); ?>
</div>
<p class=”postmetadata”>Posted in <?php the_category(‘, ‘) ?> | <?php edit_post_link(‘Edit’,”,’|‘); ?> <?php comments_popup_link(‘No Comments »’, ‘1 Comment »’, ‘% Comments »’); ?>
<!– <?php trackback_rdf(); ?> –>
<?php } ?>
</div>
<?php endwhile; ?>
<div class=”navigation”>
<div class=”alignleft”><?php posts_nav_link(”,”,’« Previous Entries’) ?></div>
<div class=”alignright”><?php posts_nav_link(”,’Next Entries »’,”) ?></div>
</div>
<?php else : ?>
<h2 class=”center”>Not Found</h2>
<?php include (TEMPLATEPATH . ‘/searchform.php’); ?>
<?php endif; ?>