An article I wrote was posted to the Facebook Engineering blog, about the automation system I worked on at Facebook for MySQL Database Provisioning.
It covers, in fairly intimate detail, a system called "Windex" that we use to provision and re-provision our MySQL databases at Facebook. This system basically provisioned the new Facebook Datacenter in LuleƄ, Sweden, with very little human effort, saving us loads of time.
So, if you're curious about some of what it is that has been taking up all my time for the last year and some, or if you're just always curious about how Facebook is doing things, go check it out.