This is a work in progress. This is my initial attempt at the front end/client side of a WiFi controllable reflow oven. It's just html and Javascript so it should work on any OS or phone device using the web browser. 

The first screen allows you to create a reflow profile, save it, or open an existing profile. The second screen shows the reflow profile target as the blue line and then plots the actual temperature over time in orange.  Right now I don't have it actually hooked up to anything, so I'm simulating the temperature reading data.

I put together a basic ESP8266 Arduino example sketch for how to get it working.  It's just slightly different than some of the ones that were published by seeedstudio etc including some changes in the baud rates that worked for me.  I also put together a schematic on how to wire up everything. Be sure to use level shifters on the Arduino TX line if you aren't using a 3V Arduino like I did.

I posted the schematic and code for my LED Dimmer demo on Github

Someone on Ebay now has the ESP8266 WiFi modules for sale (almost?) cheaper than you can get them from China, $5 with free shipping within the US - crazy!  Link

There's a new, low-cost wifi chip on the market.  You can now get the chip built onto a serial module board shipped from China for about $5 through aliexpress, although it takes about 3 weeks to get them in the mail. You can now get them much faster shipped from the US for about the same price .

The ESP8266 module I got looks just like an HC-05 Bluetooth module and works about the same way with AT commands over serial.  There's not much documentation out on it yet, but there's a community starting to develop around it.  

I built a little proof-of-concept demo around it.  The demo is a web site hosted on google app engine that allows you to control the brightness of an LED connected to an Arduino.  The Arduino polls the web site via the WiFi module and updates the brightness of the LED as you change the slider on the webpage.  More documentation to come, but here's a quick gif of the ESP8266 demo in action