Example high-profile PHP sites

For a number of reasons, I need to offer a client a list of big, impressive-sounding, high-profile sites using PHP. I went looking for the list on PHP.net, and the closest I could find is http://pt2.php.net/sites.php which, as you'll see, is suffering from a fatal error. I did find a list at http://php.datalogica.com/sites.php which, while helpful, seems a bit dated. Does anyone have some favorite examples that aren't on this list? I've been preparing other arguments as well, but the "all the cool people are doing it" examples will help. Thanks! -- Maurice Rickard http://mauricerickard.com/