Augmented Reality sample code using Gyroscope

Morning,

I have hunted around StackOverFlow for about an hour and found lots of sample code (mainly github) for creating Augmented Reality apps that display where a 2nd location is relative to your current location (e.g. New York).

However, I noticed that none of these are using the Gyroscope functionality provided in the iPhone 4 that gives a far smoother experience to the end users.

Does anyone know if such an example of sample code exists?

Cheers,

Charlie