Got FlexWiki installed and working! You can now check it out. I've broken up my old "Writing Code Is Stupid" paper and added it to the Wiki as a starter.
FlexWiki has a very interesting concept of a federated namespace. Basically, you can create a FlexWiki and I can import your namespace and very easily cross link to your topics without embedding HTML links. Nice!
The tricky bit is going to be deciding what goes into the Wiki and what goes into the Weblog. It certainly feels like the two should be merged into a single platform. The thing I hate about weblogs is that they are only organised by time and old and useful content gets lost and buried. Maybe the answer is something like Textpattern?