New posts will have comments enabled where comments might be beneficial (administrative posts like this one don't need comments). All old comment threads are closed, except for "Postcolonial FAQ." If you have further comments on old posts, I'm still happy to hear them, but please email me.
Instead of creating a new web page with all the old comments, I just edited the comments that were already posted and appended them to the original posts. I haven't done this for older posts yet, but I will do it soon.
I ended up using a slightly more aggressive editorial policy than I had originally intended to do. I realized that I didn't want comments that are pointlessly ugly or mean (either to myself or to the writers under discussion). So I took them out. And there's no need to preserve off-topic comments.