I recently hacked my Canon SX10 IS with the CHDK pack. This add the nice feature to remotely trigger the camera. Really useful to do night shooting. I wanted to make a cheap but efficient remote control. I found all the needed parts in a Dollarama dollar store for only 3$. In the headlamp we have all I needed: a 3 AAA battery holder and a trigger push button. I simply replaced de leds circuit by the USB extension cable. And now, I’m ready to do long exposition steady shots!