I know the guys are busy working on other things so I am going to chime in here.
Regarding the BJCP style guidelines, although there is merit to bringing BeerXML in line with their schema, it may be a wild goose chase. As the community at large we do not have much sway as how they present the schema. They could change encodings, namespaces and the schema as a whole at will.
That being said, I do prefer the way they the BJCP guidelines are laid out.
I think it would benefit all to move this project to a more open forum to allow more direct contributors to the project, at this point it seems pretty dead here. To that end I have created a new repository on GitHub for tracking changes and allowing everyone to contribute to the project: https://github.com/brewpoo/BeerXML-Standard
I have not yet pushed the repo yet but will do so by the end of the weekend.