> I believe OpenVPN is something specific to Linux, no? m0n0wall uses the
> standard FreeBSD VPN components.

m0n0wall has three types of VPN, the beta now also includes OpenVPN.

> It sounds like you are refering to creating two VPN endpoints for two
> private networks and passing traffic to each? This sounds like a common
> VPN scenaraio, which is very simple to configure with m0n0wall. It would
> look like this:
>
> network A (192.168.1.0/24)-- <http://192.168.1.0/24)-->> m0n0wall --> internet <-- OpenVPN <--
> network B (192.168.2.0/24 <http://192.168.2.0/24>)
>
> And you'd like each private subnet to pass traffic to the other?

Yes, I would think fairly popular, however the default interface on the
web interface doesn't allow such a configuration.  Although i've yet to
confirm it, my client is broken in China, the OpenVPN documentation
shows how to do it:

http://openvpn.net/howto.html#scope

i.e.  set a client configuration directory, add an iroute configuration
for each client using the common name, and finally set routes for each 
client network with -route.

-- 
Steve-o