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 fo

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. They've acknowledged that it was causing a problem for their developers, so to the extent that they want to help out their developers, that counts as admitting a mistake. Though yes, they do mention their other priorities, so technically it isn't a full admission.