OK, I want a "bare bones" motherboard. Does it exist?

[kitepilot at kitepilot.com]

I run my firewall off of a motherboard with video and sound and drive 
controllers and what not list of useless (for my application) components. 

My "dream motherboard" would be one with an Ethernet adapter, at least 3 PCI 
(or PCIe) buses so I can plug in 3 NICs, and a couple of USB ports to stick 
a USB drive to run the system from. 

Does such a thing exist?
Thanks!
ET