In February 2018 I received an email from "mR_Slug" who had taken a
Netvoyager LX-1022
(aka Aztec A3x00 thin client), added a second ethernet port and turned it into a
pfsense firewall/router.
The article can be found here.
[April 2020] The original link: http://108.59.254.117/~mR_Slug/projects/netVoyager/ was found to be dead. Luckily I had mirrored the article some time ago so that's now where you go. I then found it has moved to: http://66.113.161.23/~mR_Slug/projects/netVoyager/ where, as of April 2020, you can find the original and mR_Slug.