You guys must have a lot of spare time...
1. The Xbox360 is not going to be in an unopenable case. No way.
2. The creative methods some of you are suggeesting to make it unhackable are ridiculous in a low-cost, mass-produced game console. It would give MS terrible service/test/reliability problems also.
3. The Xbox360 will be in a conventional case, with probably only marginally better *physical* security than last time.
4. Remember that when the 360 is released, your posts will still be here...