Trying to make the "who's online" section match the look of an existing skin isn't easy. The only way I could do it, and I only just now started looking, was to replace

	<?php
		$Sessions->display_onliners();
	?>

with

<?php
	$Sessions->display_online_users( 'my_before_bit', 'my_after_bit', '$user_preferredname$ $user_msgformlink$' );
	$Sessions->display_online_guests();
?>

I'm thinking it would be cooler if this section was either a "require blah _whosonline.php" like linkblog or a SkinTag like categories. Either way allows for much easier skin-specific tweaking.