Submission + - Skin-based interface makes your arm a touchscreen (newscientist.com)
crowfeather writes: "It goes by Skinput (PDF), and it reads the ultralow-frequency taps on your skin where the "pico" projectors on cell phones shine an interface on your forearm. It exploits the different sounds the skin, musculature and skeleton make in combination to determine just where you're tapping. Currently, it's a little sensitive on placement of the projected interface, but there could be an arm glowing on you in the not-too-distant future."