>> >         Asked another way, "should" m0n0wall 1.2b9 have a WAN IP set 
>> > up?
>> yes
> Does that mean m0n0wall can't be a "true" transparent firewall?
>
"true" transparent firewall can still have management IP on it's bridged 
interface :) I've seen comercial product like that..

M0n0wall can be "only bridge", but is usable only if you can connect to NTP, 
Syslog and other servers via LAN interface, one way or the other.

I have it set up ip-less on WAN, with LAN pluged in on same switch but 
different VLAN, and static routes to access syslog server, NTP server, and 
others via LAN interface (since servers are in yet another VLAN)

Regards, Bostjan