So I stuck a CD-RW drive into the Foxconn Atom box and discovered that the pushbutton on the front panel doesn’t move quite far enough to actually hit the corresponding button on the drive.
Popped another drive off the heap and tried it out, just for grins, with the same result. Evidently the cute little ribbed back on the silvered panel button (near the bottom of the picture) isn’t quite long enough.
Solution: a bit of rubberized high-traction tape stuck to the drive button (near the top of the picture).
This is a black-on-black situation, so I pushed the contrast enough that you can actually see it.