Comment Meta Box

<?php

function my_comment_meta_box($comment){?>
<div class="meta-box-sortables" id="normal-sortables">
<div class="postbox " id="wedco-com-meta">
<div title="Click to toggle" class="handlediv"><br></div>
<h3 class="hndle"><span>My Meta</span></h3>
<div class="inside">

<?php echo 'put meta box stuff here'; ?>

</div>
</div>
</div>
<?php
}
add_action('add_meta_boxes_comment','my_comment_meta_box');

//Save Comment Meta - No form in the above example - this is extra and for future reference
function my_save_comment_meta() {
$comment_id = $_POST['comment_ID'];
$posted_meta = $_POST['my_meta_name'];
update_comment_meta($comment_id,'my_meta_name',$posted_meta);
}
add_action('edit_comment','my_save_comment_meta');

?>

Comment List Columns

function add_comment_columns($columns){
return array_merge($columns,array('metafield_name' => __('Meta 1'),'metafield_name2' => __('Meta 2')));
}
add_filter('manage_edit-comments_columns','add_comment_columns');

function add_comment_column_data($column,$comment_ID){
switch($column){
case 'metafield_name':
if($meta = get_comment_meta($comment_ID,$column,true)) echo $meta;
break;
case 'metafield_name2':
if($meta = get_comment_meta($comment_ID,$column,true)) echo $meta;
break;
default:
return;
}
}
add_filter('manage_comments_custom_column','add_comment_column_data',10,2);

?>

Quick add page style

<?php
function sat_add_styles(){?>
<style type="text/css">
.row { overflow: hidden; background: #eee; margin-bottom: 15px; }
.columns { min-height: 50px; background: #ddd; }
.block-grid li { background: #ccc; }
</style>
<?php
}
add_action('wp_head','sat_add_styles');
?>