I suppose you could also do this using a theme.
Create a new page called browse.
In your theme's functions.php put the following code:
function mosaic_shortcode($atts) {
global $post;
$old = $post;
extract(shortcode_atts(array('category' => '','show' => 16), $atts));
$show=intval($show);
$mosaic= new WP_Query();
$mosaic->query('showposts='.$show.'&cat='.$category);
$html='<div id="mosaic">';
while($mosaic->have_posts()) : $mosaic->the_post();
$image = get_post_meta($post->ID, 'image', $single = true);
if (!empty($image)){
$html.='<div class="mosaic-item">
<a href="'.get_permalink().'" rel="bookmark" title="Permanent Link to '.the_title('','',false).'"><img src="'.$image.'" alt="'.the_title().'" /></a>
</div>';
}
endwhile;
$post = $old;
return $html;
}
add_shortcode('mosaic', 'mosaic_shortcode');
Then on the browse page put whatever text you want and the shortcode: [mosaic] This will display the 16 most recent posts as long as you put the url of the image thumbnail in the meta field called image for each post.