This is one angry baby. I saw it in a recent joystiq post and laughed continuously for at least 15 minutes. It gets funnier the longer you stare at it, although at some point it becomes far too intimidating and you have to divert your gaze. To appropriate an obscure Futurama reference: "It's too grumpy!"
Also, check out google's recent addition of homepage themes, making it just that much easier to zone out at work (thanks Jeff)