Actually, I appreciate your comment. I (tell myself I) was not able to commit to publishing previously because I could not make much time to provide updates. However, I think 1) this was probably a cop-out 2) the next couple of months will be more open. I am going to remove some interim text and/or comment it out and then publish for half price or something like that. Thanks for the push!
Seriously, though, if you think it'll save someone some time or effort, it may be worthwhile to hit the publish button instead of waiting.
(I'm a cofounder of Leanpub, so I'm kind of biased, and being flippant here. Feel free to ignore me if it's not ready)