We're Building A Reader
I think a 2013 Reader should be an open source web app you can run yourself or pay to use as a service, which runs on a server pulling in feed data, and then as a detachable HTML5+JS+localstorage client that downloads the data and can run offline.Building another hosted RSS reader project just gets us back to step 1 in terms of one company's ability to yank away a tool that functions almost like a newspaper to many people today.NewsBlur looks like it just got a ton of new github watchers since this announcement, and would maybe be good to treat as the defacto "open RSS reader platform" leader - 
https://github.com/samuelclay/NewsBlur