2-node pfSense cluster failover

I really really like what I see in 
http://pfsense.iserv.nl/tutorials/carp/carp-cluster-new.htm
and I happen to have a former HA NFS system based on mini-ITX
with two dead drives I would like to convert to a firewall.
This would work with the embedded image, right? I've flashed
a couple of CFDISK.1E (from PC Engines) with a 256 MByte 
CF, which does seem to boot, and talk on serial. Unfortunately
I don't have access to these mini-ITX (VIA EPIA CL10000,
that's a C3 chip) to test. But these should work, right?

Unfortunately, these systems only have two NICs, and are in
a Travla C147 case http://206.14.132.88/products/Travla/c147/C147.html
so I'm not sure I can get more NICs in, even with a PCI riser.
My prior HA setup (drbd/heartbeat) used a crossover over serial
for signalling. No way to do that with pfsense, right?

-- 
Eugen* Leitl <a href="http://leitl.org";>leitl</a> http://leitl.org
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