Supermicro A1SRi-2358F in the wild?

That looks like a nice board indeed. I haven't seen it myself but it should run FreeBSD just fine. Most SuperMicro boards do. If you click on the OS Compatibility link for this one SuperMicro even tested it for FreeBSD 10.0.
Yeah, I've been told the same around 200 US or so for this board. Pretty affordable for Supermicro quality, a quad Intel NIC port and 7 watts. Not to mention fanless. I guess it woul'nt be all that useful for those who like to do transcoding but for a stable professional system with a dedicated function, this looks pretty good on paper.