Do you have the stock front sway bar? Did you replace the sway bar bushings with poly bushings? I had a similar squeak that I could only reproduce when going over bumps. Turned out it was the new sway bar bushings, greased the hell out of them and it went away.
I also had a squeaking sound coming from the center console. It goes away if I push down on it while driving.
At this point I would do the tried and true "turn up the music until the sound goes away"
P.S speaking of music have you taken apart the radio assembly and made sure everything in there is nice and tight?