[TriLUG] BSD/Linux firewall with multiple ISP and failover?

[Greg Brown]

Hey all.  I think I finally hit a dead-end with M0n0wall.  My outer banks
client now requires fail over from the DSL Internet connection to a 2nd ISP,
probably a cable modem.  My research indicates that M0n0 doesn't support
this yet.

What are my options here besides something like a Cisco 2621xm (WAY too
expensive for this client)?  Does anyone know of an inexpensive appliance
that they have tested for fail over Internet?  Or can a BSD/Linux box be
built for this purpose?

Greg