The section "Your Stuff" in Google Reader contains three items: "Shared Items", "Notes" and "Trends". I'd like to see a fourth one added called "Read History". This item would link to a view of recent posts that you have scrolled past, sorted in reverse chronological order. To distinguish between an article that I actually read and one that I just zoomed by with the mouse wheel, the view should only include articles that were visible in the browser for more than X seconds (X to be determined by user testing).

I often find myself trying to find posts that you can't search for easily (such as posts that only contain an image or video) but that I know I looked at sometime yesterday. This view would help in finding those posts.