I see that Ghost is starting to ship.
It's an open source WordPress workalike that's written in node.js.
Looking for a way to hook Concord into a mainstream CMS so people look at it as an easy to use editorial tool that requires a minimum commitment.
We will eventually get it working well with WordPress, but it might be quicker with Ghost, and we may find a market more ready to try something new.
I'm starting this thread to see what people think.