How much power does that use? I run linux a firewall/router on an older laptop + usb ethernet(2) and it's about 20w. I'd prefer < 10.
Perhaps I need to try Raspberry Pi next.
Personally, I use a "Maxxwave 1106" running BSD I had laying around but it's on the more expensive side. If I was putting something together for myself, I'd get one of the small Atom boards with a couple of onboard Intel NICs.
It's a little bit more complicated to get running since it requires a custom compiled OpenWRT, but it's great to have more memory and disk space than I'll ever need in my router. I used to run on OpenWRT on reflashed consumer routers and I always had to be real careful about what I installed and ran. With the APU I can just install real `bash` and `less` and not have to deal with the crappy busybox emulations.
http://www.firewallhardware.it/en/alix_pfsense_embedded.html
I use a standard BananaPi as NAS and are very satisfied with it. It comes with a SATA interface and 1Gb ethernet.