Treehuggers's long page navigation tool

I was at Treehugger today and noticed a novel interface tool. The home page is a list of stories -- much like any blog. Not all stories are interesting to all people. And so, to the right of each story is a vertical bar that when clicked skips the page ahead to the next story. Three bars are outlined in red in the illustration. That the navigation is ever present and in the same relative location makes this a very effective means of both skipping and reviewing a long page of stories.