Ugh, I use usemod, but am currently looking for a replacement. It's old, hasn't been touched since 2002, /doesn't/ have a plugin system, and its syntax has been superseded - its table support is primitive, for instance. Good points are, that it doesn't need a database, and, I dunno, it's useable, but the bar has been raised since then. I was looking at wikkawiki, but just now have found that what people have been saying about MoinMoin appeals to me.