I have been using my6sense for a while to find content that I am interested in. my6sense does a very good job ranking content, and it is easily accessible when using the application on my phone or when viewing the Twitter site, with the my6sense extension. One downside is that I need to actively perform steps to view this content.
Summify is a service that will periodically send you an email with a summary of some stories that you are interested in. When you create an account, you associate your Twitter, Google Reader, and/or your Facebook account. Summify uses the data from those accounts to determine your interests.
Then periodically Summify sends you an email with articles that you may be interested in. You have the ability to further refine your interests when you receive the emails.
What is Summify? from Team Summify on Vimeo.