wp-query.php

query_posts( array( 
       'post_type' => 'MINHA CATEGORIA', 
       'posts_per_page' => 5 
       ) 
);
while ( have_posts() ) : the_post();

OU
//PEGO A CATEGORIA 10 E FAÇO ELA EXIBIR 1
<?php $recent = new WP_Query("cat=10&showposts=1"); while($recent->have_posts()) : $recent->the_post();?>
<a href="<?php the_permalink(); ?>"><?php the_title(); ?></a>
//<?php the_excerpt(); ?>
<?php endwhile; ?>

OU

query_posts("MINHA-CATEGORIA");
while(have_posts()) : the_post();
?>

  <h1><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></h1>
  <?php the_post_thumbnail('medium'); ?>
  <p><?php (Descrição da Imagem Destaque) ?></p> 

endwhile;
wp_reset_query();