FeedSharing allows someone to share their feeds (Twitter, Digg, Google Reader, Instapaper ect.).
FeedSharing grabs all the things that you have favorited, dugg and starred and put into your own custom feed which then you can get the raw links from and share them links out to different services like Twitter, Facebook, FriendFeed, Digg and more. For example, you can retweet the original tweet that you favorited on Twitter.
FeedSharing is currently under development with a BETA coming in September 2010.