The PageRollUp Web Part can be used to roll-up pages under a subsite. These can be normal Content Pages or News Article pages. The rollup itself is inserted on the landing page of the subsite (URL ends in /Pages/default.aspx), and the pages beneath it are automatically rolled up up with the web part when they're published.
At the bottom of every page, next to the Page Info tab is the Rollup Info tab. This is where the content that the PageRollup Web Part displays lives. Important fields from the Rollup Info tab include the Rollup Image (optional) and the Rollup Description.
This is an example of the PageRollUp webpart on the Visual Guides landing page: