CraigsList: New Views
This draw a noticeable dividing line above the last post seen on any CraigsList page or search you visit. Next time visit that page or make a search, you will only have to go through the new items, as the dividing line will tell you once you have reached posts you've encountered before. You will also be alerted if there are no new posts, or too many posts to fit one one page. Now works on list, thumbnail, and gallery view!