@modalab For anyone working with these in the future.
I needed to be on 3.8.0 for the correct driver to be picked up for the microhard to register as an ethernet device.
I needed to call dhcpcd manually to get it to pickup the static IP configuration.
I used the AT command interface to the microhard over telnet to get it to be configured correctly. Holding the button for 10 seconds did not put it into a master transmitting state (confirmed via telnet).
You need to enter AT&W after the commands to write them to the device otherwise they are discarded.
Maybe this was a fluke of the 2.3GHz model, but it was definitely not plug and play.