Wifi 3D printing / CNC / Laser with ESP8266 / Bluetooth with HC06

A friend of mine (or am I being too forward?) suggested in the comment thread on Google Plus that adding Wifi/Bluetooth to SmoothieBrainz would be a good idea:

So I added it:

Two-in-one footprint allows you to solder on either a HC-05 bluetooth module, or an ESP12 Wifi module.

For the Wifi module, preprogram it with ESPLINK firmware: