Oh! Good name for a blog. I blew right past 600 feeds before creating folders for Urgent (meaning noisy) vs Important. A Google News feed allowed me to bail a whole stack of news feeds, but, I still keep a few in a 'do not bother to read folder'. Still trying to pare and focus the feeds ...
The Shifted Librarian: RSStress
The Shifted Librarian: RSStress: "The increase in the number of feeds will leave many users frustrated, as there is a limit to the number feeds one can scan and read. Current numbers suggest that readers can handle 150-200 feeds without too much stress. But users will want to read more and more as new interesting feeds become available and they run into the limitations of the metaphor of current aggregator applications."