[jQuery] Is there an easy way to do this?

[jQuery] Is there an easy way to do this?

I am moving all of my scripts from mootools/scriptlicious to jquery.
I was easly able to submit a form and update a div (based on the output of the php file) as follows:
<script type="text/javascript">
function send(){
    var params = Form.serialize($('commentsForm'));
    new Ajax.Updater('updateDiv', '/subscribe.php', {asynchronous:true, parameters:params});
}
</script>
I can't seem to find ta way to do this easily with jquery.
Can anyone point me in the right direction?
Thanks
Brian