One of our open source projects[1], lets you consume RSS, Email, and Tweets, with more "stuff" coming, and apply filters and set triggers, etc. It's still pretty raw, and we don't have the really awesome visual interface for laying things out, but that sort of thing is something we hope to get to eventually. One other neat thing we do is pipe content through Apache Stanbol to do semantic entity extraction, and build up a knowledgebase as content is consumed.

[1]: https://github.com/fogbeam/Neddick/