Hats off! Love it! I see the Key64 influence. My input: I would strongly suggest a serious consideration for an integrated pointing device. I've had my split Kinesis (see signature link) and I can tell you from over 6 months experience, that once you split, separate, incline, ergo layout, ergo key position, and macro, that moving your hand off the home row for cursor pointing becomes absolutely ridiculous. And that's the polite way of expressing the emotion. I have an Apple Mighty Mouse on the left and an IBM trackpoint on the right. I like touch pads and some trackballs, but again, leaving the home row becomes a cumbersome chore. As a matter of fact, the integrated pointing device really started the split Kinesis project.
Regarding keywell curvature: I may not understand Sordnas view of the Kinesis wells being too curved, but then again, I rest my hands on the Kinesis palm pads. My hands are a mens large, so maybe that has something to do with it? I have a Kinesis Freestyle, and prefer the curved keywells, but the Freestyle is not a matrix layout nor does it have the columns height adjusted. I have not used anything like this particular configuration.
I didn't notice, but is there any work on an awesome programmable controller?
I have possible interest

NOTE:
I've recently had some extreme changes in my life that have dramatically shifted my time and priorities. I was about to administer the wood key cap buy, try and lead the custom controller project, and do some in-depth reviews with awesome pics of my Datahand, Alphagrip, Kinesis, and fully update and document the split Kinesis project. I wanted to build up these areas for Geekhack since GH has done so much for me. I apologize to anyone that has been waiting for me to perform on various topics, as I'm not certain when I will be able to continue.
P.S.
Wood key caps will probably go through WASD Keyboards soon.