WTF, here we are with SnowLeopard 10.6.x and it still has no automatic shutting off laptop screen (Macbook Pro) when hooking up external monitor???? Why do i have to close the lid, let my laptop go to sleep, wake it up, re-enter password, have my internet shut down and re-activate and all other processes just to shut down my MBP screen when hooked up to my cinema display??? Hell even Windows Vista/ 7 does it automatically when i tested it via Bootcamp, requiring no closing of the lid or halting any processes or the internet. WTF Apple? I find this really frustrating.