I was lent a computer in this form factor a couple years ago. Never got around to getting it powered and connected up.

I do wonder if the pcmcia form factor is just a little too small for practicality. It seems to have limited their choice of CPUs. Thermal concerns limit it to using fewer watts than the connector supports. And it's not really pcimcia standard anyway. And you can't fit a USB port on the board.

Meanwhile I have a pocketCHIP here, and the CHIP just snaps into it. The mechanical design of the CHIP is open.