ajax comments

Hi!

I didnt know where to post this idea: an ajax interface for comments module
i rewrote add comment link with javascript function so that i can load comments form in div using jquery post/load

it works when op is preview comment, but doesnt when i press save comment. actually it works but because of _submit hook it redirects and loads whole page instead of comments. how can i rewrite that or should i use different function?

$output .= theme('box', $title, drupal_get_form('comment_form', $form_values, $op));

if could do
if ($op == t("Post comment")) comment_form_submit(NULL, $form_values);
it works but then comment fields are not validated at all.

Please, give me a hint. Maybe you have ajax interface for comments module in your plans?