For the sake of clarification -- MP6 isn't necessarily tied to the 3.7 release cycle, and the core team will make the final decision on what's included in core, and when. It's possible that MP6 may keep developing throughout the next development cycle(s), and also possible that core will start to incorporate some of what MP6 has done while we continue iterating on other things simultaneously. Just don't want anyone to expect MP6 in 3.7 as a sure thing. :)