Eventually we'd like to have an RSS feed for just about everything on CodePen, but for now, we have three you can try out:

Editor's Picks: http://codepen.io/picks/feed/
Popular Pens: http://codepen.io/popular/feed/
Recent Pens: http://codepen.io/recent/feed/

We tried some stuff to get an image preview in there but haven't had a lot of luck yet. Anyone out there had luck with an HTML-to-image solution?