Is there any offical word on the Swift 2 rollout? Is it launching with iOS 9/OS X or is Xcode 7 planned to be released before the fall?
Swift 2 timeline
Well the beta is already available to download for developers.
Without knowing when we'll be able to submit apps built using Swift 2 I can't risk updating a current project that I hope to ship before the fall. That's fine, but I'd like to start using Swift 2 if it's feasible.
The very probable answer is with the release of osx 10.11 and iOS 9 or a few days before that.