This just happened about 30 minutes ago. I was browsing the web. Heard a pop (and what looked like a small flash) and the screen went black... and nothing! Wont turn on; can't do anything. The popping sound/flash came from the top-left area of the keyboard near the Expose/LaunchPad keys and I smelt burning. Did it just overheat? Anyone had this happen to them or heard of this happening? I've booked a Genius appointment for Thursday to hopefully get a new replacement. Will they be able to mirror the drive to the replacement?