[Jay] built on the epic instruction set that [Mighty Ohm] published when he first built his own WiFi radio. Both of these radios used the same method of getting onto the internet; a hacked router.
The ESP8266 is a chip that turned a lot of heads recently, stuffing a WiFi radio, TCP/IP stack, and all the required bits to get a microcontroller on the Internet into a tiny, $5 module.