With the 3com driver on Aminet:
3Com
3c562, 3c562B, 3c562C, 3c562D, 3c563B, 3c563C, 3c563D, 3c589, 3c589B, 3c589C, 3c589D
3Com Megahertz
3C3FEM556C, 3CCE589EC, 3CCE589ET, 3CCEM556, 3CCEM556B [tested], 3CXE589D, 3CXE589EC 3CXEM556
Farallon
EtherMac *, EtherWave *
Hitachi
HT-4840-13
Motorola
Marquis *
I think the asterisk means "untested."
I don't know about other drivers and their support, but 3com cards are pretty easy to come by.
