<?php $args = array(
                           'showposts' => 4,
                           'tag' => 'top'
                           );
        $topstories = new WP_Query($args);
        if ($topstories->have_posts() ) : while ($topstories->have_posts() ) : $topstories->the_post(); $storycount++;

        if ($storycount == 1 ) { /* Post 1 only*/ ?>

        <div>

            <h2><?php the_title(); ?></h2>
                <?php the_excerpt(); ?>
        </div>

        <?php } else { /* Posts 2-4 */?>

        <div>
            <h4><?php the_title(); ?></h4>
        </div>

        </div>

        <?php } ?>
        <?php endwhile; endif; ?>

        <?php wp_reset_query(); ?>