Thanks for chiming in, Semaja! Glad to see you're back in biznezz!
I guess both the MacBook and the MBP now have sudden motion sensors that are supposed to park the drive. And yet, even considering that, and how much abuse an iPod HD can take (cough, running marathons, cough), I agree, that it'll be a long time before I would feel safe doing anything like that. People come to MR periodically who are obsessed with being able to walk around campus with their notebook in their computer, turned on, so that they are not logged out of IM. I just shudder!