MicroPlaza currently in private beta is a free web service, that let you discover relevant information from the people you follow on Twitter by delivering filtered links from your Twitter timelines. Once you log in, you are presented with a stream of headlines, along with everyone who Twittered the link to that page. You can see a personal timelime made up only of links from people you are following on Twitter, or a public timeline to see what everyone is linking to. Each timeline has its own RSS feed. If interested, you can sign up using this link.