What is the function of the system?
Does it need GbE, 66MHz PCI, integrated video or AGP slot or
??? what?


This system will be use as some kind of (barebone) server, under
linux.
Fast enthernet connection is very important. Video card doesn't
matter, it just need to handle some GUI utilities.

Only 2 PCI slot will be used and both for 2 enthernet cards. Do I need
66MHz PCI to handle GbE?

There's a lot less variety in those boards, you'll need
consider the use, role of the system.
If it's just going to
be the equivalent of a desktop PC, reusing the AGP card you
mentioned and putting it in a standard (typical but large)
ATX chassis, then something like a Tyan 7505 might work.
Tyan 7505 looks good to me.

Thanks for your input.

JohnyD