Update: They've identified the chipset as the SoC S5PC100 from Samsung and thus confirm an ARM Cortex A8 running at 600 MHz (operates at up to 833MHz though) and the ability to record 720p video and handle real-time video conferencing should Apple choose to go in that direction (iPhone 3G S records VGA only). PowerVR SGX graphics and 256MB of RAM too as expected. S5PC100 block diagram:
System Board: Up Close
System board chips and part numbers can be seen below. Please view the
comparison guide for more details.
CPU - Samsung
339S0073ARM
K2132C2P0-50-F
0N1480911
APL0298
N1TVY0Q 0919
NAND Flash Memory - Toshiba TH58NVG702ELA89
IA8816
TAIWAN
09209AE
System Memory - 337S3754
CMA
G0919
5Y9307885E4
Infineon - 36MY1EE
A9177314
Z171033B
iPhone 3G S system board is shown on the left, right board is iPhone 3G.
Click below for the full image: