I'm thinking of buying the new Aluminum Macbook 2.4Ghz, and since the SuperDrive is basically SATA2 drive (vs ATA on the previous mb), I'm thinking what would take to swipe that with, lets say 7,200rpm hdd or SSD. It would be highly beneficial if we could run our OS X out from the HDD thats placed on the SuperDrive's spot, and have another HDD on its regular spot, where you could hot-swipe (not quite, but with a shut-down) them whenever you want, depending on what your tasks are. An external SuperDrive is much more economical, since you dont really need the speed and the access time while youre watching DVD's, while in Music or Video industry, the speed is crucial. I'm not sure if this has been done before, but would love to hear your input. Please discuss.