If you wondered how Apple managed to make the MacBook Air so thin, here are two photos:
The first is of the 1.8" hard disk with its ZIF connector. It is placed in a frame with tthe motherboard fitted in the notch that one can see on the left.
The second more interesting photo is of the mother board. The smallest chip on the upper left is the processor, while the larger one next to it is the chipset that contains the integrated video. One can see in the lower middle the chips of non-removable RAM.
The integration is incredibly compressed, and this mother board must contain many layers of circuits which must push the price upwards.
[translation by crispin]