I built a firewall/router out of this board, with Linux and shorewall. It took a trick with the installer to get it to go, but it's run for a couple of years now without hardly a thought. I love it.
I agree with the separation comment, but you can buy a radio for this board, and make it do wifi as well. The case even has pre-cut holes for the antennas. I've thought about doing it just for the fun of it.
At 11 cents/kWh for electricity, and an average load of 9W, that makes the APUD14 cost a whopping $8.67 per year to run. I'll gladly trade $7 over the course of a whole year in order to have a general-purpose OS on which I can run all sorts of interesting things.
http://www.pcengines.ch/apu1d4.htm
I agree with the separation comment, but you can buy a radio for this board, and make it do wifi as well. The case even has pre-cut holes for the antennas. I've thought about doing it just for the fun of it.