Google Nexus One's Hardware Components: Looking Good has a running list of the hardware components in the Nexus One, gleaned from the Android 2.1 ROM. Read onward for lengthy and confusing chipset names!

* Proximity Sensor/Light Sensor: Capella CM3602 per in Nexus One ROM Dump.
* Accelerometer: BMA150 3-axis Accelerometer per in Nexus One ROM Dump.
* Magnetic Compass: AK8973 3-axis Magnetic field sensor/AK8973 Orientation sensor per in Nexus One ROM Dump.
* Wifi Radio / Bluetooth / FM: BCM4329 in lib/modules
* In I found "Routing audio to Speakerphone with back mic" reference.
* In I found "Stereo FM speaker" also referenced.
* Audience A1026 Noise Canceling Chip – No link but here is the A1024 found in

We'll update this list as more evidence comes to light. [TheseAreTheDroids]