[Videx]

Well, I finally got around to hacking the heck out of it and here's my version that uses is.gd instead of bit.ly (which I could never get to work). A shame there isn't some way to test this besides LIVE.

PHP Code:

// The array below are the ids of non-public forums, update these to be your admin forum ids or anything non-public by default
$excludedForums = array(0);

if (!in_array($foruminfo[forumid], $excludedForums)) {
    $myUrl = 'http://www.myforum.com/forum/showthread.php?t='.$newpost[threadid];
    
    $cURL_resource = curl_init();
    curl_setopt($cURL_resource, CURLOPT_URL, 'http://is.gd/api.php?longurl=' .  $myUrl);
    curl_setopt($cURL_resource, CURLOPT_RETURNTRANSFER, 1);
    $shortUrl = curl_exec($cURL_resource); 
    curl_close($cURL_resource);
        
    $tweet = '';
    if (isset($newpost['prefixid']) && $newpost['prefixid'] != '') {
        $tweet = $vbphrase['prefix_'.$newpost['prefixid'].'_title_plain'].' ';
    }
    $tweet .= $newpost['title'].' '.$shortUrl;

    // http://classes.verkoyen.eu/twitter/
    require_once 'twitter.php';
    $twitter = new Twitter('MyTwitterName','MyTwitterPassword');
    $twitter->updateStatus($tweet);
}