Aglo is an experienced web software developer. He's built several CMS systems. He's used a pile of languages. Currently he's most fluent in PHP and C#. He's actively considering building a competitor to most of the Wiki software out there because he's been looking at what seems like hundreds of systems for the last few days, and is appalled at the user- unfriendliness of the stuff he's seen. The few that he's seen that have been user-friendly have been simplistic in their approach to community generated content.
At the top of his list of dislikes is the absolutely useless navigation available in most wikis. No wonder they aren't much much more widespread.