Just a quick note here to say that I've just released an update to the Xiaomi Cube beta driver that brings back full functionality on all action types (shake, flip, slide, rotate, & knock). All actions generate button X pushed events, with the number of buttons based on the choice of 3 different modes set in the device preferences: 6 buttons, 36 buttons, or 43 buttons.
I'd be very interested to see how well it works in conjunction with @codahq's Mood-Cube app.