I just received my new MBP today and after a thorough inspection, I noticed that there is a faint vibration. To be more specific, the vibration is strongest directly above the HD, but it resonates throughout the entire body. If you can, try to imagine what a low hum would feel like - that's the issue. Before you dismiss this as being overly critical, my 4 year old Asus laptop doesn't vibrate half as much (the HD is also near the palm rest). I'm not sure what's causing this problem either - I flipped off the back cover and the HD is securely fastened. Someone posted a similar problem on the Apple website, but they ended up getting an exchange. Now, I'm a little worried because (1) my computer is BTO (320HD @ 7200), and (2) the closest Apple store is about 2 hours away. Any suggestions?