just get a 16bit n2000 lan card... ok not all of them will work...
but let me say this: i had a pcmcia lan card sitting somewhere unused, i didnt even think of trying it in the j720, then someone talked me into trying it, and it worked after entering the driver name
don't know how lucky i was
(or not
). really worth a try... C:Amie recommends only the 10 mbps cards though.
don't forget CF lan cards either!