The WD MyBookLive has a little motherboard with a ARM CPU on it. It just mounts on the SATA under the hard drive with the 4 screws on the bottom of the hard drive. Has a Gigabit Ethernet too.
I think this would be good for Ben to hack a RS-232 in to it so could in stall other Linux OS on it. Or maybe even USB ports on it. Neat tinny motherboard.
-Raymond Day