Quote from jjb:

Did you find any indication on possible of adding GPS to ipod touch?

Unless there's a dedicated GPS receiver chip in there (which I don't see), the answer is currently no until apple makes the Bluetooth serial profile available (so standalone units could be used) or someone finally ships a receiver that connects to the accessory port. Same for a compass/magnetometer.

And yes, I'm aware of the MIPI and MDDI interfaces, but the parallel interface is predominant at present.

Quote from CityZ:

A camera could connect using as few as 4 pins (ie, USB). With that in mind, two things pop out: the 6-pin device to the left of the camera space (is it a connector?), or the 5 solder pads below it around the hole (do they already connect something?).

Most imager ICs use 8-10 lines for output data, 3 lines for output-synchronizing clocks (frame, row, & pixel), one line for the master input clock, two lines for an I2C command-control interface, two supply lines (one for the digital I/O voltage reference, another for the analog reference), and ground -- call it 20 lines. The Nano's imager connector matches that perfectly.

Quote from nofunsir:

... what is that connector on the left, the one with 34 pins?

Looks like the interface for the touchscreen (step 4).

Could be excess underfill or conformal coating.

Quote from brady:

I want an FM transmitter in my iPhone 3GS! That would rock...and roll?

So the chip supports it. Is there an FM antenna path and swtich? The spec shows FM doesn't share the Bluetooth and WLAN RF path, namely because they operate in different frequency bands. If the RF path isn't there, it doesn't matter whether you enable the feature in software or not.