I was watching a podcast the other day and they advertised this website...
www.paper.li
It allows you to enter your Twitter ID or your Facebook ID and once a day (it will email you when it's ready every day if you ask it to) it creates a newspaper style webpage of all the links that were included by you and your friends.
It breaks it down by category (sports, news, etc) and shows which of your friends provided it.
You can also check out the "papers" of your friends.