And on the back of the lower motherboard:

Qualcomm PM7540 power management IC

Skyworks SKY77336 power amplifier module

Audience A1026 voice processor, used in conjunction with the two microphones.

One of the two speakers used to project stereo sound through the Surround's speaker grille.

Once again, all three chips are identical to those found inside the Nexus One. If it ain't broke, why fix it?