This wiki is based on TWiki. It's not very fast, but has an overwhelming wealth of useful functionality and a vibrant community. The blog is based on BlogAddon plug-in, which lets you treat the posts almost exactly as all other topics. Hopefully it will prove to be a lasting solution. I'll try to migrate my posts from TiddlyWiki and Blogpost here as time goes by.
I'm editing this very post in Vim, called from w3m. I would prefer a more reliable editing interface than Web, Mediawiki seems to have grown one. Thanks to TWiki's simple storage format - plain text files in RCS - I could edit them directly, but that would void me of many automated helper functions. The bright side is, even if I find a solution better enough to make another switch a reasonable step, it would be a snap to migrate most of TWiki's articles.
All in all, I'm quite happy with this setup. I've been yearning for a good personal wiki/blog for months now - and here I am, using a heavy-duty enterprise wiki. Maybe it will keep me from learning HTML, CSS and all that web mastering stuff while providing me with a decent web content management system.
See you!