Until an announcement is made otherwise, developers should be aware
that the iPhone SDK is still under non-disclosure (section 5.3 of the
iPhone Development Agreement). It can't be discussed here, or anywhere
publicly. This includes other mailing lists, forums, and definitely
blogs.
This situation is somewhat different than a Mac OS X release, in that
a Mac OS X release includes a copy of the developer tools with the
distribution. The iPhone OS 2.0 release on devices and as an upgrade
does _not_ include the development tools. As a result, the SDK is not
automatically considered public because the release has occurred.
Section 5.3 of the iPhone Development Agreement remains in force at
this time, and will so remain until iPhone Developer Program members
are specifically and personally notified by an authorized
representative of Apple.