...call it what you will. There is a sound -- you know -- THIS sound (http://www.youtube.com/watch?v=mJmpervXe9M) and it's driving you (and me) crazy. How many people have this problem with a stock configuration (meaning, you didn't customize your MBP in any way)? I have a MacBook Pro here at work, and it seems to be the standard configuration for the 15" Core i7 (no hard drive, screen, RAM upgrades) and I cannot get it to make the sound no matter how warm it is and no matter how much I shake it or push on or near the trackpad. Mine, on the other hand, did have all those things upgraded (hard drive -> 7200, RAM, Hi-Res). The sound is annoying but, more importantly, just trying to figure out if someone is just not tightening stuff up after making internal changes.