@wallabybob:
Another datapoint about Realtek NICs.
I also have a Jetway mini-ITX board, but a 627F series board with a single onboard VIA Rhine 10/100 NIC. I purchased the single 10/100 port daughter board which has a Realtek 8139 10/100 NIC.
FWIW, 627F here also but with the addition of the 3x1Gb lan daughter board.
Despite the extra 3 potential ports, I built it out as a 'router-on-a-stick' using only the main embedded port and VLANs.
New pfSense user and I just completed the install and initial testing (looks stable so far).
Tomorrow begins production use so I don't know yet how it will hold up to load.
If all goes well, I plan on testing configs using the extra ports (versus ROAS) to see how it affects throughput and CPU load.
Great service from "logic supply" on the equipement.