I'm not sure myself. There are a few boards that claim to be good with linux that i've seen. I can't recall them at this time. I'm going to be building 2 linux machines soon. I've been wondering the same question but to no avail. I recently purchased a network card for a windows machine i just alterred. The brand is Belkin. In the manual it mentions that it's compatible with LINUX/UNIX.
I haven't tested out the card yet, but if the card seems good/decent in windows, then i'll perhaps try it out in one of the linux machines i build soon. You might want to look into it yourself. Dont know if it really is compatible... but its worth a try... and it only sells for 15 bucks.