sorbetcms/plugins/post_confirmation.php

<?php
/*
Plugin Name: PostConfirmation
Description: Add a confirmation dialog when submit the Create-post button.
Author: Victor Bracco
Author URI: http://www.vbracco.com.ar/
Version: 1.0
*/

class post_confirmation extends plugins
{
    public function post_confirmation()
    {
        $this->addAction('admin_includes', 'post_confirmation_script');
    }

    public function post_confirmation_script()
    {
        global $admin_includes,$isEdition;
        if (!$isEdition) {
            $admin_includes .= "
			<script type=\"text/javascript\">
			$(document).ready(function(){
				$('#publish').click( function(){
					return (confirm('".__("Do you realy want to publish this?")."'));
				});
			});
			</script>
			";
        }
    }
}