If you or anyone else has typing data or is willing to collect some, please post a comment on my blog (preferably [here](http://mtgap.wordpress.com/2010/01/16/wanted-typing-data/)) and I will email you.
Ideally, we would have typing data not just from QWERTY and carefully-designed layouts, but randomized layouts. All the layouts people use (except QWERTY) share design patterns—putting the most common keys on the home row, etc. We can get more accurate data if we know how people type on random layouts.
I plan on using a little grant money from my school to pay some people to learn randomized keyboard layouts and then record typing data. If anyone's willing to do this for free, I'd love to have your help; again, you can contact me by leaving a comment on my [blog](https://mathematicalmulticore.wordpress.com/).
Data collection with a web app is also a good idea. I don't plan on writing such a thing any time soon, but if anyone does plan to, I think it would be very useful.