Has anyone hacked an IOS cable and knows what data is going in and out of which wire. Maybe a diagram of an iphone cut cable?
Pinouts.ru has a great description of the connector.
The iPodLinux wiki has a great page describing the serial protocol.
Here is the connector diagram (with the blank side of the connector facing up):
Pins 12 and 13 are Tx and Rx, respectively. Rx and Tx are TTL level. Pin 1 is GND, and pin 21 is serial enable. To enable the serial port, tie a 6.8 kΩ resistor to GND.