Google Reader is the best web rss reader where you can read your suscribed websites . Now if you want to share these article on twitter or facebook then there is no direct way . But you can do this by using a website twitterfeed . First you have to create a account on this site and after that give the rss feed addres of you google reader shared page . And now the every article which you share will now be posted on twitter . And you can also track your links .