I'm going to try to create a background for stuff I produce. A first draft of a few items is here:
Strange City background
Don't be surprised to see other ideas that I have proposed make their way into this.
For now, I purposely want to keep this short. I don't want a thousand pages that players or GMs have to read through, but I want it to provoke ideas, and it doesn't do that yet.
Eventually, I will release it under a Creative Commons license of some sort, but not now.
EDIT: I should actually release this in parts on this blog, rather than requiring you to download and read a PDF. So maybe I'll do that.