Toluu is a free service to share your feeds with others and also by introducing your feeds to this site you can find feeds similarto yours, the most useful thing of this site for me is exploring others feeds, you can see your friend's feed and his/her friends feed and etc. i found a few useful sites by this method.Registration is by invite (yet) and I have 3 invitations if you want, comment here and include your email.
source : makeuseof.com