I am Domas Mituzas, and I have just joined Facebook MySQL team. I've been working at MySQL Support before, as well as did Wikipedia data and performance engineering on my free time - and I've blogged about that a bit. Here at Facebook I've started working on large scale database deployment introspection - we want to know that everything churns happily, and knowing what is wrong and why it is wrong is the first step to improving the mental and emotional state of our servers. Now, fetch me few thousand scalpels, before I grab my axe... ;-)