Great project, but has this been updated in the last 2 years? Apparently, using this build, only a few of the keys actually worked, and that the author was waiting on some parts to try an improved version. Still, a very interesting project, but it would be nice to find out the final result (which escaped cursory exploration of the blog).
First I've heard the term "electrocapacitive" with keyboards! I'll have to deep dive on this...