Then I thought, well, most people wouldn't find this the easiest thing to get running - a web server needs to be installed first, after all - so what if I offer the use of it to other people so they can use it even if they can't get it running themselves?
Those who know about wikis know that one of the fundamental design principles is that anybody at all can change anything at all. Well, in the case of TWiki (and I'm not sure how many other WikiClones), there is an access control system. You can restrict reading and/or writing at your discretion, by page or by web. Now a web is a subset of pages that acts almost like an independant site. I've made a web for my own novel's background information and restricted it so that only I can read and write in it, while leaving the rest of the site open. You can do the same.
The catch is that I can't create subdomains under write-on.homeip.net - only under write-on.indy. Therefore, the address of my wiki is http://ideas.write-on.indy/ - you can only access it if you are using the OpenNIC. If you're not already using OpenNIC, there's a little blurb down at the bottom of the page with some info.
Once you can get to it, you can look around and see how things work. There's a "Test" web that's wide open, feel free to muck about and add pretend information to a pretend story background. I've put in a few things just so it's not totally blank. There's also a "Notes" web which is for - well, notes. Anything public, anything shareable, anything to do with writing. You can, for example, post a story idea you had but aren't planning on using. You can post notes on building up backgrounds. You can collaborate with other people to write an article for Write On! even.
Hey, I think it's cool.