Except that all the planets aren't exactly like the moon. They will all have different gravity, day/night cycles, ores, ETC. From what I've seen of the general minecraft population, he has to make sure that it looks like a work in progress, or the kids would just download it see it's buggy and write it off as a crappy mod. Then there would be a ton of unfinished versions out there. I mean realy look unfinished. Like slap you in the face with it. The other thing I've noticed is common with most minecraft forums, is that asking when something will be done is punishable by ban. I thought it was funny at first, then I joined this forum. Yeesh.