A couple of comments on this thread...
You can buy Miami TCP/IP commercial version if you look on E-bay, people who no longer use it sell it...
Also, Elbox's Mediator card will give you cheap acccess to a PC ethernet card
"ACCESSORIES:
It works perfectly with the whole range of network, sound, modem and ISDN cards;
MPEG-2, MP3 decoders and TV cards."
---From Softhut