USB->ethernet
I'm using one of these at home with Server and a mini. Works just fine. Only issue is that occasionally, when I do a software update that requires a reboot, sometimes I have trouble getting it to start using the USB ethernet port. It looks like it's working (lights blink once a second when I ping, etc), but for some reason it just doesn't recognize any incoming packets.
Every time this has happened, I've screwed around with the settings some (changed them, changed back), and rebooted, and it's started working again. And since I don't have to update very often, this is not a big issue.
-fred