It is a good idea to talk with people who are not involved with your project from time to time. A fresh set of eyes is always a good thing. I met with Anthony Fontana a few days ago to go over BG Views, and BG Views Mobile. He mentioned one of those "why didn't I think of that" features: Category RSS feeds.
Since this is something that is relatively easy to do in Movable Type, I ended up adding the feature now instead of letting it get buried on my To-Do List of Doom. For the time being, until I roll it our across the entire network,
Freddy's Food Blog is the only site that has category feeds right now.
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This is up and running on the Sports blog, and will be up on every other blog soon.