People have done it and it is easy (apparently), I however have not tried it yet but basicly you run a small bit of software on the Server (I think 2000 may already come with some) and then use Sting and all is good.
That does not really help but my brother says to go to a newsgroup called
comp.sys.atari.st
They have just had a long descusion about networkcards and connecting them to the net vis routers, etc.