Welcome to my first instructable... I wanted to make a wired remote for my Canon EOS 400D, and the Canon-Wired-Remote wasn't exactly what I had in mind: - It had 2 buttons (one for focus, one for taking the shot) and not the 2 step (half press) buttons on digital cameras. - It was just too bulky (sorry videokid842). I proudly present the marker-pen wired remote for Canon cameras. The top button is a two step button (pressing it focuses the lens, and pressing harder takes the picture). The side switch is for bulb mode, keeping the shutter open for as long as it takes (to create those long to make light drawings).
http://www.instructables.com/id/Canon-Marker-Pen-Remote/