This was one of the tools I built during my time at Linden Lab. It is meant to make it easy for employees to indicate when they will be out of the office, and to easily see when their teammates will be gone or otherwise unavailable.
I developed both the back-end (MySQL/PHP) and front-end (HTML/JS) components of the system from start-to-finish, though I owed Johnhenry Righter a big debt of gratitude for making it actually look good.