In November. We're shooting to have it out by mid-November, but at this point, it's mainly a 'when it's ready' timeframe. It's going through the final development and bug-fixes, but this is a big release, so if it doesn't pass our Quality Assurance tests, that can delay the release.
Hope that helps answer your question, and sorry I can't be more specific. We're very excited about this release with the Open Graph Action support as well as the 3rd party extensions we're supporting, and can't wait to get it out!
Thanks,
Alex