Well, I didn't end up getting a 3/80, I got a 3/60 and may get a few
more to boot (no pun intended).
The Sun hardware FAQ is a bit wrong here in that they can have up to
24MB (as opposed to 12MB) of RAM.

I'm wondering what kind of services will be required in order to boot it,
and what kind of security risks they may pose (assuming the serving machine
is connected to a LAN via the NIC and the ubernet via a serial device).

Of course this means that, lacking a vested interest in seeing, or ability to
even test a 3/80 port, I will be unable to help on it.  Sorry :-/