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://188.8.131.52/~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://184.108.40.206/~mR_Slug/projects/netVoyager/ where, as of April 2020, you can find the original and mR_Slug.
Any comments? email me. Added February 2018