From what I remember, all I had to do was plug the amiga into the router (linksys), and set everything to DHCP. I would start miami (from user startup) and have the settings at DHCP. Things worked great! When I looked at the connections on the router, the amiga showed up. Heck, even the dreamcast showed up =)
Now setting up samba to mount the amiga on the PC screen and vice versa... THAT was a little bit trickier.
-Thorrin