Last week I finally got around to publishing the initial 0.1.0 version of my personal wiki system Miki. I'm not planning on turning it into any fancy OS project or anything, so please don't expect me to setup mailing lists or give much support for the software. However the source is there, so if you're interested in a simple wiki system that runs on PHP+MySQL in about 600 lines of code, then go ahead and take a look.
There are a couple of things that I don't like about the current version of Miki. I'll be posting my TODO for Miki 0.2.0 in a couple of days.