To complement answers 1 and 2 …
Apple Developer Forums
In the pre-release area, at least some of Apple's spaces are visible to the public. At the time of writing, three:
Side notes
This is not an encouragement to have Apple Developer Forums misused for discussions that are not developer-oriented. Neither is this an attempt to alter opinions on what's acceptable within Stack Exchange.
This observational answer is, essentially, a hint that answers to some questions may be already public within the apple.com domain. This aspect of Apple's recent shift towards openness may seem inconsistent with Apple's guidelines for Apple Developer Forums, in particular –
- only discuss seeds in the confidential forums
– however I'm reasonably certain that public discussion of seeds is no mistake. https://forums.developer.apple.com/message/10442#10442 from me was approved by moderators, and draws attention to Google indexing what's published. Also I received a next-day response, from Apple, to the contact that I made on 2015-06-10:

Also, in MacRumors Forums: Membership-free, limited public access to Apple Developer Forums content (captured).