From http://developer.apple.com/iphone/program/
We have decided to drop the non-disclosure agreement (NDA) for released
iPhone software.
We put the NDA in place because the iPhone OS includes many Apple
inventions and innovations that we would like to protect, so that others
don’t steal our work. It has happened before. While we have filed for
hundreds of patents on iPhone technology, the NDA added yet another level
of protection. We put it in place as one more way to help protect the
iPhone from being ripped off by others.
However, the NDA has created too much of a burden on developers, authors
and others interested in helping further the iPhone’s success, so we are
dropping it for released software. Developers will receive a new agreement
without an NDA covering released software within a week or so. Please note
that unreleased software and features will remain under NDA until they are
released.
Thanks to everyone who provided us constructive feedback on this matter.
