I have the classic macbook pro, 2.5ghz, nvidia 8600, and I notice that of course the laptop isn't completely silent. And it shouldn't be considering all the fans, moving parts etc. But the one thing that kind of bugs me is that there's a slight electrical buzzing noise coming from right under the keyboard around the delete or \ key. I'm 99% sure this is just the normal sound of the laptop with current running through it. But I wanted to get it checked out with the rest of you. The sound is constant from the minute I turn on the lapto, on or off battery, and doesn't change in intensity at all regardless of volume on the speakers or screen brightness. If you put your ear up to the far right side of the keyboard, do you hear a sort of low level buzz (kind of like a fly zapper?). I sent my macbook pro into applecare to check this out and they ended up replacing the logic board and hard drive (who knows why), but the sound is exactly the same now that I have the thing back. I'm inclined to think it's just a normal sound (like the HD whirring), but some people have more sensitive ears than others. You can hear the buzzing at about normal using distance (1-2 ft). It's pretty imperceptible at further distances, but you would notice it in a very quiet room. Please don't tell me your macbook pro is DEAD silent as we know there's always the HD clicks/whir/fans etc. But do you hear a slight buzz towards the right side of your keyboard when you get close to it? Let me know!