To move your comment form above your comments, simply add this bit of code to your functions.php file:
[php]<?php
remove_action( 'genesis_comment_form', 'genesis_do_comment_form' );
add_action( 'genesis_before_comments' , 'genesis_do_comment_form' );
[/php]
The code above which you add should be placed anywhere after this in your child theme functions.php file:
[php]require_once(TEMPLATEPATH.'/lib/init.php');[/php]
And before the following closing code (if it exists):
[php]?>[/php]