As in most other unibody MacBooks, the Air's trackpad is held to the upper case with six tiny Phillips screws and comes out without much hassle.

In addition to a plethora of connectors, we find the following chips on the trackpad board:

STMicroelectronics STM32F103VB microcontroller

MXIC MX25L2006E 2 Mb serial flash

Broadcom BCM5976A0KUB2G trackpad controller

Finally, we free the display assembly from the upper case by removing the Phillips screws that secure the two hinges.