CNC Room just told me they are having their prototype PCB's made for their new UB1 breakout board.
It'll have similar specs to the MB2, but the UC300ETH will plug right into the board, so no 5LPT motherboard or ribbon cables required.

-15mm taller than MB2. but same width.
- 2 none-isolated analog input, 5v and 10v tolerant select able .
- 2 isolated analog outputs. they are 2 PWM channels of UC300ETH.
- 3 relays.
- 8 inputs safety circuit.
- There are 5V isolated inputs for TTL device as well. The users can hook up low voltage MPG.
- All 5 LPT ports and pins accessible. 3 isolated ports, same as MB2. 2 non-isolate ports, as extended header .