> Before I do this - has anyone done any work on any such adaptor? I
> know of the D-Link DE600 driver for 1.1, anything else?

I'm using DE600 driver for NetBSD-1.2 (it is not rvb's version, but
Senmyo's version), and it should be easy to port it to 1.3_ALPHA.

But, (IMHO) DE620 is definitely better hardware than DE600, 
so I recommend you to write driver for DE620. :-)
--
soda