Yep.... there are two computers running in there, probably the only setup like this I've ever seen. Actually the physical installation of the boards was relatively easy. Getting the right configuration for switching between the two has been difficult. I'm trying to avoid an external mess of wiring....so I've been trying several setups.
I'm trying a Toshiba Dynadock. It's working rather well. It's an external 6-port USB hub, which has a 10/100 LAN port, a serial port, a complete USB sound system, and a VGA port. I plugged a USB modem into the back of the dock also, plus an external USB DVDRW drive, and the wireless receiver for the keyboard/mouse. So by using the external USB switch, I have most everything I need wired to the Dynadock. I'm not using the VGA out. The computers each have one USB cable attached, plus the video cables. Makes for far fewer wires.
Hit one button on the switch, and everything shifts between the computers, and the monitor automatically selects the right input. Seems to be the easiest/simplest way to deal with this setup. So far anyway.....
And I'm done with the wood shell.....stained, and varnished. It's big and heavy now. I can't lift it anymore, but it rolls easily on the casters.
What's left......fan control. It runs too cool most of the time, and I'm unable to lower the idle fan speed of most of the fans in there, so there's more fan noise than necessary. At 100% CPU usage, the temps are just fine. So I'm considering a different fan control system.....maybe a T-Balancer.