There was a device that someone made on the internet - using a servo motor to press the button. I am trying to find it and will post it here if I do find it. Also a intervalometer for a point and shoot camera was available too.
Here is one commercial device
http://polepixie.com/pixie-click-remote-trigger.cfm - appears to be a solenoid pushing the button, and allowing for mounting the camera - anyway, we have to use the tripod mount otherwise we need a special housing for each camera.