"Breeze Systems' DSLR Remote Pro allows a Canon EOS-1D, EOS-1DS, EOS 10D, 300D, Digital Rebel or Kiss Digital digital SLR to be operated tethered to a PC using the FireWire or USB cable...."
Now we just need a housing for a notebook, and a 5M cable with firewire through a standard bulkhead connector.
You could just leave the camera and computer down there and shoot time lapse of an event. Pretty cool.
Actually, my remote shutter release for my Canon has time lapse features. I should really get that thing housed and connected through a remote bulkhead. Then, I could just leave the camera on something and come back later. But I'd probably always keep the thing in site to ward off sticky-fingered divers.