Had to answer maybe. The HD would have to somehow be user servicable, maybe like the way SIM cards are installed/removed. I would have no interest in send out my PPC when (not if) my hard drive failed. Also, if I am going to dump 2-5 (10 8O ) GB of data onto a hard drive, I am going to need a fast way to do that, like maybe firewire.
I am not worried about losing the data from a failed HD as most likely it would all be copied from a location on a laptop or desktop which would be backed up regularly.