I was working on this major revision of board design for a few days, and managed to put a Wi-Fi module upon the SPI-Flash. Besides the support of Wi-Fi, there are also some enhancements in this version:

• Added a button for switching to FEL mode (BROM program of Allwinner)
• Added ESD protection for USB and audio jacks
• Some routing optimization

I have just ordered boards of this new version, and the design will be updated on GitHub once I have done the verification.