Rules implementation for 6.x

Hi,
I'm using 6, where workflow_ng has been superceded by Rules, so I knocked together the code below. It's very basic, it just duplicates the workflow_ng functionality that's available with UserPoints for 5.x - it could do with some conditions, and would be good if User Points itsself had some Rules events, but it's all I needed for now. Just whack it in userpoints.rules.inc and you'll be able to add points based on Rules events.

//userpoints.rules.inc

/**
 * Rules hook implementation.
 */
function userpoints_rules_action_info() {
   $actions = array();
   $actions['userpoints_action_grant_points'] = array(
      'label' => t('Grant points to a user'),
      'arguments' => array(
        'user' => array('type' => 'user','label' => t('User') )
       ),
      'module' => 'Userpoints',
	  'eval input' => array('points')
  );
  return $actions;
}

/**
 * Rules action - grant points to a user
 */
function userpoints_action_grant_points($user,$settings){
	userpoints_userpointsapi(array('uid' => $user->uid, 'points' => $settings['points']));
}

/**
 * Rules form configuration - allow number of points to be set by the rule
 */
function userpoints_action_grant_points_form($settings = array(), &$form) {

  $form['settings']['points'] = array(
    '#type' => 'textfield',
    '#title' => t('Number of points'),
    '#default_value' => isset($settings['points']) ? $settings['points'] : '',
	'#description' => t('The number of points to award')
  );
}