posts on 2 columns ? how about more columns?

hi there
i have a site with my posts arranged in this order, on 2 columns , like in image below https://img209.imageshack.us/img209/2795/35524646vy9.jpg
using this code :

<?php if (have_posts()) : ?>

		<?php $count=0; while (have_posts()) : the_post(); if(!($firstpost == $post->ID)) : ?>
		<?php if($count % 2 == 0) echo '<div class="left">'; else echo '<div class="right">'; ?>

			<div style="">
				<h2><a href="<?php the_permalink() ?>" rel="bookmark" title="<?php the_title(); ?>"> <?php the_title(); ?> </a></h2>
				<small><abbr>Posts &raquo; <b><?php the_category(', ') ?></b></abbr> - <?php if(function_exists('the_views')) { the_views(); } ?>  </small>
			</div>
		</div>
		<?php if($count % 2 != 0) echo '<div class="clear"></div>';?>

		<?php $count++; endif; ?>

		<?php  endwhile; ?>

<div style="clear:both"></div>

<?php else : ?>
<div class="entry">
		<h1>404 Not Found</h1>

	<?php endif; ?>

so … how can i make it 3 post columns… or 4? or more ?
please, i need some help.
thanks!