Crux text has unveiled its Crux360 clamshell-keyboard case for the iPad The case works in four modes. Laptop Mode turns the iPad into a netbook, while Movie Mode allows users to twist the screen to face the opposite way to the keyboard to watch movies. Tablet Mode flips the screen to lie flat against the back of the keyboard for e-reading and Carry Mode allows the screen to be closed facing inwards to protect it from damage.