Lucent Orinoco (or whatever they are now) 11m/bit wireless cards (wavelan) are
supported.  it should not be a huge piece of work to extend that to one or
more of the pcmcia wired ethernets.  you'll probably need to add
the dynamic configuration entry for it to be usable.

USB ethernet is unlikely to be possible because the SA11x0
provides device-end USB not host mode.  i'd expect USB
ethernet gadgets to be devices not hosts.  there is a host USB mode in
in the SA1111 auxiliary chip but since the chip isn't completely wired up
it probably isn't usable.