It's a pretty app that looks like it's taken a lot of design inspiration from Google Reader. Which is a good thing, I think they nailed it in terms of UI.

That said, I was really hoping you'd have your own sharing mechanism. The major thing Google Reader lost in the transition was the ability to share and comment in a unified manner - having to go to Twitter or Facebook to read comments on something you shared elsewhere is a pain.

Also, doesn't look like there's any tracking of read/unread items.