The Asante card needs drivers installed - I used the Asante 5.2.9 installer floppy from here
successfully. (Finder will complain it's damaged and offer to fix it, the fix is successful in my experience).
-nbc enetnb uses the Apple card which already has drivers built in.
OS X hosts currently do not support Ethernet at all; I will be correcting that before 0.144u1.