I have a feeling that this question (or one very much like it) will be asked many many times.
I propose a new set of Wiki pages that would list the different PhatBox firmwares, different PhatBox firmware versions, their features, their quirks, their bugs.
This would correlate nicely with a set of pages about car makes, head unit models, and what it takes to get a PhatBox working with said head unit.
Furthermore, it might be useful to enumerate the different PhatBox hardware versions and include that information in the new pagespace.