Inspired by the following Kickstarter project "anrachnio" I modified my Mighty-Stick V2 into the Mighty-1284P wifi module with a low cost ESP8266 module. The ESP8266 module can be plugged into the right Angle female header located where the ICSP header was on the Mighty-Stick V2.
The BOM, Schematic and Gerber file will be available after the PCB is tested.
More info. at: http://www.firebirduino.com/mighty_stick/