Klezio is an Semantic RSS Aggregation Portal. It fetches news from RSS feeds, uses openCalais to retrieve the semantic and fetches many interesting stuff (Context) such as Wikipedia, Wikinews, Flickr, twitter and delicious stuff, it also suggests connexe news to the reader.
The idea is to surround the news item with relevant data coming from great apps.
The website is brand new and perfectible, and I'm working on it.
http://www.klezio.com