Low power Wi-Fi embedded modules recommendation?
Digi has been a manufacturer of Xbee ZigBee modules for some time now, and has recently released similar modules for Wifi.  



They simply connect to the microcontroller using DIN, DOUT, CTS and RTS, as shown in the picture.  

  

Not sure if this qualifies as low power, but spec says 140mA receive current and up to 260mA transmit current.