It didn't take long for someone to use that vulnerability to open up the entire server. People are posting from the @phpfog Twitter account and someone posted the entire codebase: http://twitter.com/#!/communistcake/status/49340298677075968

Edit: Actually, the links in that message appear to just be mirrors of the links at the bottom of the article.

Edit 2: Links in that last status are now dead. Wonder if the young Elliot Speck is trying to walk it back a bit.