Mini atx for firewall

[Francisco Reyes]

Anyone used a mini ATX machine with FreeBSD?
Have a client that has a space limitation and a mini atx machine like

http://shentech.com/shutspacskvi.html

Would be perfect for him.
My primary concern is the network card. Since these small machines only
have one PCI slot I will add one card for the internal network and then
would need the onboard card to connect to the outside world.