FriendShuffle is a delightfully simple service just launched tonight. Log in with Facebook Connect and it will create a web-framed slideshow of the pages "Liked" by your friends on Facebook. Shuffle through, discover new content recommended by trusted sources with similar interests (your friends) and Like some of it yourself.
It's a great example of how simply putting a new interface on top of an established API can lead to hours of fun. This is the best interface I've seen yet for enjoying the links your Facebook friends have shared. It's like StumbleUpon but the algorithm is social, not behavioral.