Im sorry to tell you guys this but it will be cracked. There are just too many veribles and different ways to crack it including through the USB ports, Game Saves, Hard Drive, Ethernet Port, Standard Add on Chip, most of all which deal with the buffer.
So dont worry it will be cracked nomatter how you look at it. The more things they add the more ways it can be cracked. But dont take anything away from M$ they are well aware of the problem and they are not going to make it a easy task. "haha i cant believe i said that about M$"
One way i can think of though involves LIVE and i think a big reason they made it so that everybody gets on live out of the box is to help with piracy basically taking a image of your xbox and if anything ever changes with that image from the first time you sign on to LIVE to the day you throw it away it will not work in some way.
Just my 0.02
Chris