ReadBurner – Google Reader Aggregator
http://www.readburner.com/

ReadBurner aggragates items that are shared on the Google Reader. This works by constantly updating RSS feeds of currently several hundred linkblogs. In order to filter out the best stuff ReadBurner counts, whenever an item is shared by multiple persons. Since Google Reader users can generally be described as very tech-aware, they think that over time lots of good stuff can come out of ReadBurner. This has been added to Bots Blogs and News Aggregators Presentation Resources.