I'd like to execute a form submission asynchronously so the user gets a quick response. There appears to be no way of doing this in PHP. So I'm thinking about using the system() function to execute a php script as if it were executed from the command line using a nohup background(&) unix/linux technique. The problem is how do I get Drupal to work doing this? Can I just do what the cron.php script does?
Any pit falls?