Hoo - that was an excursion into RFC2616 that told me I'm getting rusty in my http protocol.
But what I ended up with, between that and fsockopen() is the following wee script:
<?php
$response='';
$fp = fsockopen ("status.nominis.net", 8082, $errno, $errstr, 30);
if (!$fp) {
$response = "$errstr ($errno)<br>\n";
} else {
fputs ($fp, "GET /msn/sillytrout@hotmail.com HTTP/1.0\r\nHost: status.nominis.net:80\r\n\r\n");
while (!feof($fp)) {
$response.=fgets ($fp,128);
}
fclose ($fp);
}
echo $response;
?>
Still very close to the example code there. But run it, and you should see something useful: the 302 Found response that tells your browser where to go for the appropriate image...