With all of the I/O connections on the back, the main motherboard houses all of its important ICs on the front:

Texas Instruments AM3703CUS Sitara ARM Cortex A8 microprocessor

Texas Instruments TPS65921B power management and USB single chip

Samsung K4X51163PK 512 Mb mobile DRAM

Ember EM357 integrated ZigBee/802.15.4 system-on-chip

Micron MT29F2G16ABBEAH4 2 Gb NAND flash memory

Skyworks 2436L high power 2.4 GHz 802.15.4 front-end module

And under that last EMI shield: Texas Instruments WL1270B 802.11 b/g/n Wi-Fi solution, just like the one we found in the Kindle Fire