I've created a user interface which re-purposes the Caps Lock key to something more useful. During user studies some participants mentioned they did use the Caps Lock key from time to time. (Sidenote: I replaced the behavior of Caps Lock with Caps Lock - A)
This made me wonder whether any research has been done about the usage of Caps Lock. Are there any usage statistics available? Which demographic uses it most?
It's Humanized's project Enso, which inspired me to re-purpose the key for something more useful.