Still reading through the backlog here, and have almost finished chapter 1 and exercises.
One thing that has come to mind is that it would be nice to have a link between each lecture/set of puzzles. So a reading order, and for each post a link to the previous and next thing to read. Would that be easy to do without adding too much overhead?
The main reason for this is that looking at the default board view it's not necessarily obvious what I should look at next. Many people won't be able to read every conversation either, and if you're not able to follow as the conversation goes (say you're away for a week or more) then being able to jump back in to where you left off would be nice.
An alternative would be an index, perhaps on the wiki page or stickied to the top of the board, and it would probably be nice to have both!