Currently, the HN article listing makes no distinction between links to new material and links to older articles. While it's good to have some of the more interesting older web content cycled through Hacker News, it would be beneficial for these links to be tagged or marked in some way to identify the items as such. Too often, I will follow a link to something that contains interesting content and find out that it is fairly dated. This in itself isn't bad, but having an identifier on these types of HN items seems like it would be an improvement.