CF Ethernet for FreeBSD?

[Brett Glass]

Everyone:

I'm working on an embedded system which will be using a small Intel 
Atom motherboard with a single Ethernet port. The problem is, some 
configurations of the system are going to need two Ethernet ports, 
and only available ports on the system are a few USB slots and a CF 
(CompactFlash) socket.

FreeBSD has drivers for several types of USB-to-Ethernet 
converters, but USB is a pretty inefficient way of doing Ethernet. 
So, I'm interested in finding out if anyone knows of an Ethernet 
interface which will plug into the CF socket and has drivers for 
FreeBSD. Please let me know; any help would be MUCH appreciated!

--Brett Glass