First the EMW3162, if you didn't heard of it here is some info about it:
The EMW3162 is an WiFi chip by mxchip, combined with an STM32F205RG on a small board.
- 120 mhz
- 1M flash
- 128k sram
- seperate wifi chip, with private arm cpu 802.11a/b/g/n
- ultra-low power blablabla
- JTAG flash interface
- 10 $ !!!!