Cool Header - Automattic

The other day i was in VJ's blog. I saw a private password protected section.
I initially thought Vijay had added some password protected page to his wordpress blog. Later searching the net, i came to know it is a feature of wordpress. I don't think blogger has any such feature.

The pages's headers had this nice http header. :-)

"X-hacker: If you're reading this, you should visit automattic.com/jobs and apply to join the fun, mention this header.
"
Automattic is a virtual company. No office. Interesting. They are the guys behind wordpress.
http://automattic.com/about/how-we-work/