Googlebot Monitor is a free PHP script that notifies you when a google bot visits your page. Configure Googlebot Monitor to send email to any adress or with some coding, have it send to varriety of users.

This is a free php script that notifies you when google bot visits your page. To install this script, simply copy paste into your page and edit email address you want to be notified.

if(eregi("googlebot",$_SERVER['HTTP_USER_AGENT'])) {
  $s = "";
  foreach($_SERVER as $item => $value) {
    $s .= "\n$item : $value";
  }
  $sdate = date("Y-m-d h:i:s");
  $message = <<<MESSAGE
Visit date:$sdate
Information:
=================================
$s
=================================
MESSAGE;
  if($google_alert) {
    mail("youremail@yourdomain.com", "googlebot alert", $message);
  }
}