[antmldr]

http://images.apple.com/privacy/docs/legal-process-guideline...

Page 4 onwards provides a list of information they provide to law enforcement agencies. Probably prudent if you're an apple customer to simply assume all of this information is as good as public.

[joosters]

I. Extracting Data from Passcode Locked iOS Devices

...

For all devices running iOS 8.0 and later versions, Apple will no longer be performing iOS data extractions as the data sought will be encrypted and Apple will not possess the encryption key.

Interesting. What changed in iOS 8, I wonder?

[arrrg]

Law enforcement access is not the same as public access. I think it is extremely important to make that distinction. And there is one.