function post_to_socialcast($message, $url = false) {
$socialcast_url = "https://SHORTCODE.socialcast.com/api/messages.json";
$message = "message[title]=".$message;
// link this message?
$message .= ($url) ? "&message[url]=".$url : "";

// curl options
$options[CURLOPT_SSL_VERIFYPEER] = 0; // important
$options[CURLOPT_USERPWD] = "EMAIL:PASSWORD";
$options[CURLOPT_POST] = 1;
$options[CURLOPT_POSTFIELDS] = $message;

single_curl($socialcast_url, false, $options);
}

Obviously you need to replace SHORTCODE, EMAIL and PASSWORD with your own values. This code uses my curl library that you can find at: http://www.onlineaspect.com/2009/01/26/how-to-use…

Hope that helps. Feel free to email me if you need more.