Here's what people have asked and answered about working for and interviewing at OpenX.
It's like many internet startup or some movie production environments. Very laid back and flexible. They have a very relaxed dress code and encourage diversity from every perspective. They feed you, encourage toys, play and even visits by pets. They expect lots of hard work and you need to put in your hours, but very flexible about how you do it.
There's a rule about piercings? ... LOL ... For OpenX this is a laughable question. I would say that any company that doesn't blink if you come to a meeting in the office wearing shorts and sandals and arriving on a skateboard or electric hover board, would not give much of a thought to piercings or other body art of any kind in whatever placement.