While I have not previously seen an app that uses key input and accelerometer data like this one, there have been some academic publications that discuss pairin

While I have not previously seen an app that uses key input and accelerometer data like this one, there have been some academic publications that discuss pairing using similar accelerometer readings: Hinckley, 2003: http://depts.washington.edu/dmgftp/publications/uist04/uist_papers/Synchronous%20Gestures%20for%20Multiple%20Persons%20and%20Computers.pdf http://depts.washington.edu/dmgftp/publications/uist04/uist_... Mayrhofer, 2007: http://comp.eprints.lancs.ac.uk/2230/1/TMC-2008-07-0279-3.pdf http://comp.eprints.lancs.ac.uk/2230/1/TMC-2008-07-0279-3.pd...