Post Levels
Post Levels, originally authored by Filipe Fortes, last updated February 16, 2007. After being abandoned by the original author, I decided to take up the project without consulting with him, using his code as a basis for my own Post Levels plugin.
I began my take on this project on Dec 11, 2008.
I opened a bugtracker for the project, as I anticipate needing this feature indefinitely going forward. I have a lot of information I would like to add to the blog for my own use (or for the use of a limited subset of people.)

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[...] are the hidden posts and post levels. I’m aggressively pursuing the post level code as my own these days, doing my best to wrap my head around what the author did when writing this plugin, and [...]