<div id="blog-sidebar">

	 <div class="more-work-links"><h5>More in Portfolio</h5>
	//pulls only 1 post!!!
     <?php query_posts(array('post_type'=>'portfolio', 'numberposts' => 5, 'orderby' => 'rand')); ?>
	 <ul><li><a href="<?php the_permalink() ?>"><?php the_title(); ?></a></li></ul>
    </div>

   <div class="sidebar-posts">
   <h5>Recent Posts</h5>
<ul>
//works fine.
<?php
$args = array( 'numberposts' => 2, 'orderby' => 'rand' );
$rand_posts = get_posts( $args );
foreach( $rand_posts as $post ) : ?>
	<li><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></li>
<?php endforeach; ?>
</ul>
    </div>