http://hackaday.com/2009/01/13/multitouch-...d-into-android/ The above link is an example of multitouch hacked on to a single-pointer touch input device. Theoretically, this method could be applied to the DS using colors' (the painting app) ability to read pressure. You may have noticed in calibration, that you can get it down to around 20 (a number nearly impossible to reach without breaking the screen/damaging it), by simply putting down 2 styli on the point that it callibrates on. The ds's x and y change rapidly when there are two points, depending on the pressure of each. This could be solved by snapping it to a grid, and having it go to the nearest area, then converting the x and y data given to the ds to the locations of the two points on the ds screen. I believe the creator of Dphone made something of the sort to emulate the iphone's image zooming/rotation. Could this method be used on the ds? Or is it to complicated, and if it could be done no one would bother to code it?