@Devtard - The Codex will be disappearing in the future in one form or another. Instead, most of this stuff will be added to the Develop.WordPress.org site mentioned by Drew. Some of it may also end up in a handbook.

This is one of those huge efforts that may get unnoticed in the future but I'm glad Brian Richards, Drew and others are going through with it. It's one of those things that if it gets done now, it will have huge positive gains for the future.