I’ve changed the layout of category and monthly archives, which are accessible on the sidebar. Instead of loading all posts in a given category or month, it will load only the titles arranged in reverse chronological order. Clicking the titles will take you to the post.
This will prevent very large downloads (there are currently over 340 posts in the ‘World War 4’ category, for instance), making navigation a bit cleaner and saving me some bandwidth.
UPDATE: I have also finally got around to categorizing all the posts from before I switched to MovableType. There will be more slight modifications as time allows.