I've been using my graphing calculator in NoteFolio mode with the keyboard. It actually works fairly well, but I notice that I have made more typos than I normally do. I'm not sure if it's the touch of the keyboard, or my tendency to hit the keys hard.
While playing around, I found
a really cool use for a calculator - Making a Robot.
Is that cool or what! I already have some robot stuff, so I don't think I'll be doing it soon, but it looks like a truly geeky and fun activity.
If you decide to do it, please send the pictures to me.