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2.7 release branch has forked and we've started using it on cloud. I expect the open source official release will be along shortly. The marquee feature is a brand new text editor with a new interface designed from the ground up. It's available as an addon, so you can move to it when you're ready, regardless of when you upgrade core. I should also note that file uploads in it are currently restricted to images, so you may not be quite ready to switch if your site does a lot of file swapping via comments.
Full release notes will accompany the actual release.