Authors Loop WP - reference: http://pastebin.com/u8pTcAPS ( http://core.trac.wordpress.org/ticket/16854 )

loop-authors-wp.php

   <div id="colunistas">
      <h2>Colunistas</h2>
        <ul>
        <?php
          $teste = array();
            // 01
            $the_query = new WP_Query('posts_per_page=1');
            while ( $the_query->have_posts() ) : $the_query->the_post();
            array_push($teste, get_the_author_meta('id')) ?>
            <li><?php the_author(); ?> / <?php the_title(); ?></li>
            <?php endwhile;
            wp_reset_postdata();
            // 02
            $the_query = new WP_Query('posts_per_page=1&author=-'.$teste[0]);
            while ( $the_query->have_posts() ) : $the_query->the_post();
            array_push($teste, get_the_author_meta('id')) ?>
            <li><?php the_author(); ?> / <?php the_title(); ?></li>
            <?php endwhile;
            wp_reset_postdata();
            // 03
            $the_query = new WP_Query('posts_per_page=1&author=-'.$teste[0].',-'.$teste[1]);
            while ( $the_query->have_posts() ) : $the_query->the_post();
            array_push($teste, get_the_author_meta('id')) ?>
            <li><?php the_author(); ?> / <?php the_title(); ?></li>
            <?php endwhile;
            wp_reset_postdata();
            // 04
            $the_query = new WP_Query('posts_per_page=1&author=-'.$teste[0].',-'.$teste[1].',-'.$teste[2]);
            while ( $the_query->have_posts() ) : $the_query->the_post();
            array_push($teste, get_the_author_meta('id')) ?>
            <li><?php the_author(); ?> / <?php the_title(); ?></li>
            <?php endwhile;
            wp_reset_postdata();
        ?>
        </ul>
      </div><!-- /#colunistas -->

?>