Add Notes Column

gistfile1.txt

function populate_custom_fields_in_post_list_view ($column_name, $id ) {
	global $post;
	$email = get_post_meta( $post->ID, 'automaton_client_email', true);

	switch ($column_name) {
	case 'notes':
		echo show_most_recent_comment($post->ID);
		        break;
		default:
			break;
	} // end switch
}

add_action( 'manage_posts_custom_column', 'populate_custom_fields_in_post_list_view', 10, 2 );