If you are allowed to spend money, I would suggest going with a Wrap system.
I have been putting a few of them together lately, and they are sweet.
Easily works with 3 LAN ports, and the case is only (from the spec sheet)
160x160x25mm (which is tiny!).

Board:
http://www.mini-box.com/WRAP-1E-2-Board-3-LAN-1-MINI-PCI?sc=8&category=19

Case:
http://www.mini-box.com/WRAP-3E-Enclosure?category=19

Power:
http://www.mini-box.com/15w-AC-DC-Power-Adapter?category=13

Compact Flash card:
http://www.mini-box.com/128MB-CF?sc=8&category=14


Same exact thing that I've been making (except I've been using the 2-ports)
and they work perfectly.

Mito


> -----Original Message-----
> From: Ron Carter [mailto:wcarterjr at earthlink dot net]
> Sent: Thursday, March 15, 2007 12:26 AM
> To: m0n0wall at lists dot m0n0 dot ch
> Subject: [m0n0wall] Need to make a m0n0wall disappear
> Importance: High
> 
> My wife has requested that our M0n0Wall box disappear.  She states that it
> is in the way.  And is a hazard to the 14 month old whom is just startingt
> to walk.  Has anyone got any suggestions on a small foot print case that I
> could use or a suggestion on how to take a old giga pro system board and
> turn it in something small.  I have 4 interfaces now but can down size to
> two it need be.
> 
> CAN ANYONE HELP??????
> RC