On his blog today, Chris Shiflett an article mentioned in this previous post from the O'Reilly ONLamp.com site about PHP and scalability.
There's an interesting blog entry on O'Reilly's web site discussing Digg's PHP Scalability and Performance. As part of his research, the author (Brian Fioca, a Java developer) interviewed Owen Byrne, cofounder and Senior Software Engineer at Digg, and built his own PHP application, Jobby.
Chris also points out some of the interesting comments made in the entry, including mentions of Digg's stats and some great comments testifying to the light, powerful nature of PHP.