Seems very interesting. But coming at it from the perspective of someone with no prior knowledge of you or your website, or the keyboard analyzer tool, I felt there was some very basic info missing about the project's raison d'etre that would help me understand the purpose of it all.
I read (ok, skim read) a number of pages on the site and came across a lot of technical explanation and even the word acetylsalicylates. Yet I still couldn't tell what exactly you're assessing, and why: WPM, number of typos? Total distance travelled by fingers? Subjective measurement of RSI pain/fatigue? And who is the site for: people worried about RSI, coders who want to type as quickly as possible, interested consumers who want to get a sense of the market's breadth, retailers, engineers?
I'm sure I'd get answers to those questions if I drilled deeply enough into the content, but they should have been made clearly available to me earlier. I shouldn't have still been wondering those things after reading 3 or so pages. If I arrived from Google, I probably wouldn't have hung around long enough to get any actual value from the site.
I hope that feedback helped.