There is a difference between the alias that the Finder makes and the symbolic link that can be made from the Terminal. To the Finder though, an alias and a symbolic link are represented visually the same way and do the same thing when selected. In the terminal though, they are definitely different. You can follow symbolic links in the terminal, but not an alias created by the Finder. The same is true for FTP sessions, you can follow symbolic links, but not an alias created by the Finder. I'm not sure about an Appletalk connection, but I would think it should be the same for an FTP connection, but I don't know for sure. If you are an Admin on your machine, you should be able to go up to the root anyway and find your FireWire HD in the Volumes directory at the root. I often do this over an FTP session myself.