Seeed sent me a Wii Terminal a couple of months ago for review. Quite a nifty and powerful little microcontroller box. Very nicely made. 

Only issue is that it's a bit new, and the dev environment is a little fragmented:

- all the features (incl wifi and BT) only work under Arduino

- some of the features (not wifi or BT) work under Seeed's fork of MicroPython

- a different subset of features work under CircuitPython, Adafruit's own incompatible fork of MicroPython. Again no wifi or BT, but some of the onboard peripherals are easier to access

Cheers

 Stewart