I'm thoroughly discouraged after reading this ENTIRE thread--hoping that somewhere, someone had discovered the long-sought-after real fix.
Oh well. Installing CHUD now. Bummer.
Well--I just installed CHUD and unchecked "Allow Nap", and guess what happened? The chirping stopped...just before the fans kicked into high gear. So now I don't have chirping, I have loud fans. Awesome. So glad my $3000 Mac is so fine-tuned. This is a joke.