I have my Powerbook setup in clamshell mode with a Bluetooth keyboard. I put the Powerbook to sleep and then I can wake it up by hitting any key on the keyboard, works a charm. However, last night I was woken by the loud noise of the fan of my Powerbook. Some how the Powerbook had turned on by itself. This happened to me once before I started using the Powerbook with the Bluetooth keyboard. Does anyone know why this might happen?