Well, the good thing is that Movable Type will let me create sub-categories, so, for instance, I can have all sorts of cookbook categories. The bad thing is that so far I have yet to find a way to differentiate between top-level categories and sub-categories in the archive listing on the right. I’m sure it can be done somehow; it might just take a short while. Hang in there!
[edited to add] Okay, got it to differentiate, but it’s a bit of an ugly hack right now. Need a break; will try again later. May need to add in some of my old reviews before I can really play around with some of it so I have content to work with.