Question web sites with info about the inner workings of minecraft?

For people (like myself) who would like to contribute to PocketMine and are looking for more information & resources about the inner workings of minecraft... do you know any good sites. There was some talk about a site that documents the minecraft protocol?

I think this comment (From Shoghi) says it all:

PE Mostly, but minecraft in general if the material applies to PE.

MCPE multiplayer protocol: http://wiki.vg/Pocket_Minecraft_Protocol
MCPE level format: http://minecraft.gamepedia.com/Pocket_Edition_Level_Format
Basics of Perlin noise and pseudo random generators in general: http://freespace.virgin.net/hugo.elias/models/m_perlin.htm