Today, I tried to play with his XO, with limited success. I figured out how to turn it on and off, and where to plug the power cable in. I figured out which icon to click to use Opera, as opposed to the default web browser, and I surfed the web.
Then, I tried to use the Write program. I figured out how to get to the home screen, and which icon to click on. I figured out where to plug in my card reader. I could not figure out how to open files on the sd card -- or anywhere else, for that matter. Also, I forgot the trick mnemex told me to use, or at least, if I didn't forget it, I saw no results from using it.
I tried to go back to Opera, but I kept getting a blank screen. I tried to close Opera from the home screen, but the mouse moves a bit too fast for me. I think mouse speed may be adjustable, but I'm not sure how to adjust it.
The keyboard feels less wrong to me now, and I do have the advantage of having small fingers.