One of the comments to an older article pointed out Feed On Feeds as a good RSS aggregator, and I finally got around to trying it.
I have to admit, it’s pretty much exactly what I was looking for. The main screen lists all your feeds, with a count of how many new articles were posted. You can then mark items read, either per item, per feed, or everything. It’s really very handy. Screenshots in the extended entry.
You can click on the “1 new” or on the number of items, and it will take you to either only the new items, or everything. Here, I clicked to see what’s new at Geek Blog
My biggest beef with the software is that it isn’t templated, so if I want to change the HTML I’m changing the author’s source. If I ever get time, maybe that’s a contribution I can make to his project. It also uses the Magpie RSS parser, which is just as anal as XML::RSS which I was using in my own project, so I’m no further ahead there.