What a nice site - I've bookmarked it. It's well researched and current. It seems to be ongoing since some articles are not ye available.

I was taught in physics (don't necessarily believe it) that C as the 'natural' key was 256 Hz because that was a power of 2 and easily subdivided, and that C is produced by a 32ft organ pipe which can be similarly subdivided. This was before we adopted metric, which cocks up the ideas somewhat

Stu