AideRSS is an interesting new tool that ranks posts on an RSS feed on a scale of 1-10, so that you can spend your time reading the best stuff. In their own words:
AideRSS is an intelligent assistant that saves time and keeps you on top of the latest news. We research every story and filter out the noise, allowing you to focus on what matters most.
This is the closest thing I've seen to how I want to use RSS. Check it out.