Yeah, the compability chart says the FA411 should work, but I havent got it working with my A1200 either, disregarding what I do.
A friend of mine got a FA411 working on his A600 though with the regular cnet.device if I am not mistaken.
With a 030-card, you will not get out any more speed with a 100Mbit card anyhow. The TCP/IP-stack + driver + non-DMA nic just takes too much cpu time and memory bandwidth for it to saturate even 10Mbit.
/Patrik