would all message loggers live under _org.hibernate.internal_ or do they live across the whole package structure. Just wondering how I know which loggers exists and which to use? Probably a good idea to have a topical guide around this. 
It might be a bit of a hassle, but maybe it would be worth to have a walk through the code, introduce some core category loggers and create some log messages. This increases imo the likelihood that this approach is carried on.