I was attracted by the basic looking design, but I can't work out how to do anything. Why am I subscribed to a huge number of random feeds? How do I get rid of them? How do I view the content of the feed instead of opening a new window on the original site?

If you haven't added any feeds to your favorites then viewing 'My Favorites' shows all feeds by default.

Still working on the UI to show the article content and links to attached files.

I like the predictive aspect Personally, I'm looking for something with a GR atom API, possibly to even run the existing GR frontend against, not a new UI with a different focus (I would prefer one focusing on curation and workflow over social or sharing).