The following is an email I sent to Max Ogden. There was a very positive response, and he pointed me to IRC.
Hunter Trujillo:
Hi, Max! It's been a little while since I've last done a serious amount of work on my own voxel game engine, and during that time, your project sprung up! I'm very impressed, and especially impressed by Mikola Lysenko's treatments of the finer points of voxel graphics, which you seem to have integrated well into your engine.
Myself, I've been working on and off on a series of voxel game engine experiments since 2008. I've always taken the idea from a different direction than most, however; I'm not a fan of the first-person Minecraft editing experience. Instead, I'd rather edit things in the third-person, really, a more professional editor, similar to what Mr. Doob made his three.js "voxel painter" example.