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I Ditched the Algorithm for RSS - and You Should Too
(joeyehand.com)
This is a most excellent place for technology news and articles.
Newsblur can do the first kind of filtering. You select "best gadgets" in the title, and all posts on that feed with that phrase in the title will be hidden from then on.
Feeder can do keyword filtering on titles, but not on a per feed basis, and only with simple wildcards. I've been able to filter out a bit with it, though.