A few people have asked me how to get a random image in their signature, so I am posting my sourcecode for the program.
How to use:
1. Upload lagsig.php to a directory on your website (you can rename it to anything if you wish)
2. Upload all your signature images to the same directory.
3. Make a image link in your signature as you normally would pointing to wherever you uploaded lagsig.php (See this guide if you need help).
4. /dance
Please note: Make any image in this directory will be shown so your best bet is to make a subdirectory like http://yourhost.com/sigs/ lest your private images be posted for all the MMowned to see.
Hope you like 
P.S. If for some bizarro reason you want the php file, I put a copy here.
Code:
<?
/*
Random Image Select-0-Tron for MMOwned Members
Written by lag, posted at http://mmowned.com/
*/
$imgCount = 0;
$imgDir = opendir (".");
while ($file = readdir($imgDir))
{
$fileExt = strrchr($file,".");
$validExt = eregi("jpg|gif|png",$fileExt);
if ($file != '.' && $file != '..' && $validExt) $validImages[$imgCount++]=$file;
}
closedir ($imgDir);
$imgName = $validImages[rand(0,sizeof($validImages)-1)];
if ($imgCount == 0) die();
readfile("$imgName");
?>