I've wanted something similar to that headline navigation in a browser for a long time. Often times when reading blog-style webpages I want to scroll down to the next story (skipping the rest of the currently displayed story). Using page down requires multiple presses and often leaves the next story half on the page. I would like the next heading to be displayed at the top so it's always in the same spot and so it also maximizes the amount of the story that's displayed on the screen.

I don't know how this could be implemented nicely, though, without making it site specific. I'll have to look into vimium to see if I could at least do it for the sites I visit often. If vimium doesn't allow that kind of customization, pentadactyl and vimperator look like other possible options.