try this:
<ul id="post-list">
<?php
global $post,$wp_query;
$current_id = $wp_query->get_queried_object_id();
$args = array( 'numberposts' => 7 );
$myposts = get_posts( $args );
foreach( $myposts as $post ) : setup_postdata($post); ?>
<li<?php if ($current_id == $post->ID) echo ' class="current"'; ?>>
<a href="https://wordpress.stackexchange.com/questions/26841/<?php the_permalink(); ?>"><?php the_title(); ?><br /><span><?php the_author(); ?></span></a>
</li>
<?php endforeach; ?>
</ul>