Well, I tried a couple of configurations with additional NICs and the results are interesting. Installed an Asanté and a Farallon card. Set each card to dhcp (have a dhcp server up) and forced each one to a specific ATalk address in a specific range (no seed router). None of the cards actually took the atalk address. AFP service is running on one IP address but is configurable via any of the ones assigned. All machines on network connect to same address though. Having some difficulty connecting to the machine (looks like it fails via IP, falling back to appletalk type thing but then it connects via ip so perhaps there is some kind of contention for the connnection? The Asanté card is dark after a reboot and never lights again. Replaced all of the NICs with 3 Farallon cards. Plugged in all 3 to the switch. No built in, no Asanté on this test. Each gets an IP address, each is manually assigned an Atalk Address. Everything works, no more lag while attempting a connection, only one IP address actually gets the share from client perspective. I think I am wasting time here. Turned off the other interfaces and ran LanTest, getting faster throughput but not sure why. I'd like to blame the built-in adapter but it is probably just config changes. What have I learned? It looks like you can install additional adapters but all of the services must run from the same one when configured via the GUI. One more interesting quirk. I disabled two of three NICs via the System Preferences tool. One went dark shortly after, one stayed lit. Verified that I had actually disabled both. Yep. One dark, one lit. Traffic too. Wonder what it's talking about? Maybe I'll sniff around on this next.