Well it is time to get off the Pot and ship the first of the new Ubit RaduinoUMax.
Working like a beaver here since the PCBs arrived Friday!
The MAX is for the 16 Added I/O pins on the end of the PCB. It makes the PCB a little longer, but still fits into uBit Radio PCB.
I2C control gives you 16 more 5V digital In or Outs.
Uses Adafruits Library for simple control of them. 3 I2C address jumpers to make sure you can use other I2C items.