Hey everyone, I'm the author of that post. Needless to say, I was wrong and ya'll were right. I made a follow-up entry in case anyone is interested: http://www.jontsai.com/security/2013/05/12/pinterest-wasnt-h...

As I mention there, there was still a minute possibility that even if this didn't belong to Pinterest, it could have been an internal tool for a small team or an employee hack day/side project that got accidentally exposed.