Right behind localization, category exclusion was the most requested Smart Archives feature. To all of those that e-mailed me about it my usual response went something like, "I want to keep SA as simple as possible and have no use for such a feature at the moment, though that might change in the future."
Well, things have changed. Given that neither del.icio.us nor any other social bookmarking service allows us to put HTML in the notes/descriptions, something I've raised a stink about many times before, I'm abandoning them and doing it in-house.
I'll obviously write more about this later, but I just wanted to get the quick word out that SA now supports [single] category exclusion and the new version will be released sometime soon.
As you were.