Hacking your camera: Remote Trigger

I am still working on my panorama-rig with 10 cameras. To be frank, all the equipment is still sitting in the drawer collecting box with 1 opened camera and a soldering iron beside it.
Anyway, I found some "free" info on creating a remote trigger:
Wiley is publishing a book "Hacking Digital Cameras" (link). Check out the free pdf prevew chapter, it contains exactly what we are looking for !