I'm a big fan of the idea of a Wiki, so I'm really glad this is coming up now!
You are exactly right, of course, information about Hive is scattered all over the place and people end up repeating the same thing over and over and over again. Having Hive information as a central (not centralized) resource that can be easily accessed from all front ends and projects would be a great asset for the community, and certainty is a step towards making the Hive environment more user friendly.