If you’re trying to automate pinging Ping-o-Matic! via PHP/cURL, you may have hit into an issue where the response you get is:

You are too awesome for Ping-o-matic.

To fix this, all you have to do is add a user-agent to your curl options, e.g.
curl_setopt( $ch, CURLOPT_USERAGENT, "Mozilla/5.0" );

Once you set a user-agent, you should be able to get a valid response and have the Ping-o-Matic service ping all the services for you. Of course if you run that script too often, they’ll probably reject your request and tell you to slow down.