This is a very cool thing I just found in safari on osx mavericks.
if you have your twitter account linked to your os [it asks you the first time you log in to twitter in safari] you will have a section in the sidebar when you open a new tab with ‘top sites’.
if you click on the ‘@ shared links’ then safari will show you all the links that people in your twitter feed have posted.
whats cool is that when you visit one of these urls then safari shows the tweet at the top of the page, and if you scroll upwards it will flip to the next-newest tweeted link, and if you scroll down past the bottom of the current web-page then safari will go to the next-oldest tweeted link :D