FeedHub

FeedHub delivers just the stuff you want via RSS based on your personal preferences. It isn't a new feed reader; instead it improves the relevancy of your feeds. FeedHub works with Google Reader, Bloglines and more. Once you've uploaded OPML files, FeedHub analyzes what you've uploaded and shoots you back the stuff via RSS that you've shown you like the best. It knows this by what you've clicked on or sent to a friend. You can also explicitly say which sources you do or don't like, and a small icon shows how and why it thinks you will like something. Also links up with your blog, your Digg profile and more.