Hello all, I've recently ordered a 12" iBook and while I have no plans to upgrade it immediately, I will be upgrading it as soon as the 40 gig drive fills up (which probably won't take too long, all things considered). I'd like to install an 80 gig 5400 (perhaps 7200 if I've got the money or they come down in price) RPM drive. Before I proceed with my plans, I have a few questions: Warranty - just how shot is my warranty/can I cover this up if something goes wrong later (just slap the old 40 gig drive in place and act like nothing happened, assuming I don't do any physical damage of course)? Sudden Motion Sensor - my understanding is that the sensor is independent of the HD itself and just tells whatever HD is present to park heads when it encounters a problem. Is this correct? Heat - I know faster drives will lead to more heat being generated. Other than some mild discomfort, can this cause any problems for the other components? Battery Power - how badly will this affect battery power? Data transfer - is there a USB/FireWire connector/adapter I can use to plug my old HD in as an external drive to dump the data on to my new one? That'd would be perfect. Thanks in advance for your help.