UK Student Creates Virtual Keyboard for the iPhone by using its built-in accelerometer
http://bgr.com/2012/11/10/iphone-virtual-keyboard-accelerometer-powered/
Not sure if this has been posted already or not, but this is actually a cool concept. By measuring different levels of vibration, an iPhone can detect which key is being "pressed" using a paper keyboard. Carry a piece of paper, put it on a flat surface, put your phone on it and start typing away. If Apple increases the sensitivity of the accelerometer, it can apparently be more accurate.
http://bgr.com/2012/11/10/iphone-virtual-keyboard-accelerometer-powered/
Not sure if this has been posted already or not, but this is actually a cool concept. By measuring different levels of vibration, an iPhone can detect which key is being "pressed" using a paper keyboard. Carry a piece of paper, put it on a flat surface, put your phone on it and start typing away. If Apple increases the sensitivity of the accelerometer, it can apparently be more accurate.