I need a priority queue RSS reader. Show me the N most "important" posts across all my feeds since I last visited. Importance would be calculated a number of ways:
* Prioritize posts from low volume feeds. I probably want to see every post from a friend who blogs once a month, but not every post from Engadget.
* Most favorited/liked/whatever, especially among my friends.
* Similar posts to things I've favorited/liked/whatever in the past.
* Manually tagging certain feeds as important.
Also, I have this problem other "streams" of information, like Twitter, and email (Gmail's Priority Inbox is a good start). Some people I follow post a lot of useless stuff, but I still follow them because they're friends or sometimes say interesting things.
Is there anything remotely like this out there?