As a proof that Apple hates being publicly criticized, the company quickly reacted to the complain emitted by many iPhone developers and released the following press released::
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 dont 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 iPhones 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 s