Ah, Cammy to the rescue!
As far as AmiTCP vs. MiamiDX goes, how much lighter is AmiTCP supposed to be? What's the general memory/CPU use for either?
I can't get MiamiDX to play ball with my A1200 and CNet ethernet adapter, just will not connect. In the end used Genesis (which is based on Amitcp) and works great, very fast and small too.