Would love to check this out – what is the parts list to purchase to make this work? Just the particle photon? How does one connect it to the storebought kegbot board (what you used to be able to buy). I have a very old arduino kegboard lying around too if that is easier…
Help. 
Is there any way to incorporate the “network controller” support using an arduino with ethernet shield. If not, what would need to be done to make this possible. Thanks.
Sure, all you need to do is implement the same protocol that the particle firmware exposes. That is described here in the kegboard-particle readme; it’s far from an exhaustive spec, but that plus the code should be enough to understand.
Does the app support the Photon via OTG cable?