Sure. Basically, we go through the first half or so of Stevens' Advanced Programming in the UNIX Environment fairly sequentially. My first take was to group the example code by topic, but I've realized that it might make more sense to group it by book chapter. So that's my current reorganization plan. The thought is, with lots of topics, it will help orient people better if they have an explicit cue for what chapter to review if they are confused.
That's pretty specific to the more or less sequential approach with the book, though. It's a good book, so it can support that kind of thing.
I think it will also help with presenting the supplemental material that is linked with each chapter/section. Again, that might be specific since in the Stevens book, there is always a manpage or Single UNIX Specification reference to give for almost any section.
Can I ask what initial decisions you had, or what did you reorganize with time?