A little update.
I managed to use an iPad as a Wifi Control Chain controller today. I implemented this by using the ESP8266 to talk to the Control Chain and also open up a Wifi OSC connection to TouchOSC running on my iPad. (I chose OSC merely because TouchOSC is the only suitable dashboard-like app I could find).
I still need to polish this a bit.
Basic ESP8266 support is already on GitHub if anybody wants to play with it:
@ricardocrudo, please let me know if this is something you are generally interested in adding to your repository - then I'll create a pull request once I'm finished. Also, please feel free to provide feedback on the implementation