No, there's nothing particularly exotic to get the power down, it's an Z530 Atom with US15W (Poulsbo) as the chipset rather than one of the more power hungry chipsets (945, ION etc.). To be sure, quite a few things are turned off (Audio (no codec), LAN (no transformer), SATA (no connector), PCI Express (nothing connected to it) off the top of my head), and this probably helps keep the power consumption down. At this level, the power consumption of the Atom doesn't really matter, what you connect to it has a much
bigger impact (a USB powered DVD drive more than doubled power consumption. It's a good thing we don't enforce the 500mA current limit on all the USB ports...)
The CAD software was P-CAD, which is a rather old commercial package; but more than up to the job and probably more importantly it's our CAD package for PCB work. Everything was human routed however, no fancy auto routing (we're old fashioned!) you could probably do it with one of the free PCB design tools that are available these days, it by no means required a high end piece of CAD software like some jobs do.
As for selling as a stand alone, you'll never be able to buy one from newegg (too expensive, to sell just one it'd have to cost the best part of $1000), but if someone wants to buy one, of course we'll sell you one!