The problem with most touchscreens is that you don’t get any tactile feedback. Touch the Invisibles, a project by nosigner, Hiroyuki Ando, Junji Watanabe and Eisuke Kusachi, let you feel what’s happening on the screen. They placed a small vibrator on the fingernail and by tracking the position of the finger with the touch screen, the user can get some tactile feedback. It’s probably not the most elegant solution to this problem, but I would like to try it out anyway.
Touch the Invisibles will be on display at siggraph 09.
found at designboom weblog