Alright, I'm going to approach this from an organizational perspective and leave the philosophy to LMNO and LHX as they are much more adept at describing those things than I am.
The Black Iron Prison was/is an effort to revisit Discordia in written form. The general consensus, if it can be called that, was that while the original Principia Discordia holds important messages and philosophies, we wondered if some of the humor and language might be dated and lost on a younger generation of Discordians. Also, we are all egotistical blowhards who like to see our thoughts in print. :-D
So, we discussed ideas, memes, philosophies, etc., then we all started writing. The first result was The Black Iron Prison: Discordia Revisited. Click here
to download it and read it if you haven't already. Plans were made while this first pamphlet was being put together to produce more pamphlets, we even had titles like "Lollercaust" which would have been a more "humorous" effort with more modern humor infused into the writings. Of course, we all have lives, jobs, etc. so things did stall a bit. And then came the pd.com crash...
...so during the downtime a new message board was created where we could continue to discuss more ideas, philosophies, memes, definitions, deconstructions, so on and so forth. When pd.com came back up for good, and was under new management, the effort was moved back here. (of course the Black Iron Prison Forum crash kind of turned that into a necessity).
And so that is where we are today. That is the logistics of it. Again, LMNO and LHX can fill in the philosophical details and other things I'm sure I missed. Hope this is of some benefit. I encourage n00bs, lurkers, etc. to download the pamphlet and read it. Share it with their friends and family. And then, join the fray!