Apple is using this as a quiet hammer to limit developers’
ability to talk about problems with the new iPhone, MobileMe, the
App store, etc, etc, until Apple fixes the worst of the problems.
It’s pretty clear that 2.0 was a subset of “the real 2.0” and that
stuff was left out and not really ready for prime time, and OS 2.1
seems to be adding most of the functionality that should have been
in 2.0, and hopefully pushes all of this out of “you’re really beta
testing our stuff, we just didn’t mention that” mode.