From Feed Hole:
Feed Hole is where you can dump all of your favorite RSS feeds into one hole. Feed Hole isn't just any feed reader, though. Feed Hole remembers each story you've read while even letting you mark your own favorites. Better yet, Feed Hole will spit out a new RSS feed comprised of every story you've read, making it easy to share with your friends, family, co-workers, and ex-girlfriends. Feed Hole is like your own personal robot assistant logging everything you read throughout the day.