There are a few more chips at the other end of the logic board.

On the far left is a 338S0859 chip. It's similar to the Cirrus Logic audio codec of the iPhone 4 (338S0589).

The new AGD8 2032 gyroscope is very similar to that one of the iPhone 4.

The 2032 33DH chip is found next to the gyroscope. It seems this chip was packaged in the same die with the gyroscope in the iPhone 4. This is the accelerometer.

You can clearly see the 30 pins of the dock connector, located just below the row of chips.