We have three Asus boards here which all work
great using Slackware.
Asus P4PE (discontinued)
Asus A7V600-X
Asus A7V8X-X
None of these are Nvidia nForce chipset boards...
You should also check the
LinuxQuestions.org HCL
Edit: After reading Tim's post below I edited the above.
I should have said, "None of these are Nvidia nForce chipset
boards..." I originally left out the word "nForce"
Also search the forums to see if users have a lot of problems
with certain boards, such as nForce chipsets...