uberVU – Track conversations across the Web
Track conversations wherever they go on the Web and reply to them from one place
Context Voice : Social comments API – get blog comments, Twitter, FriendFeed, Digg and other social network comments to use inside your social software
Tap into what millions of people are saying right now to get data and insights for your app or business. Don't worry about blogs, Twitter, Digg and all the other social platforms out there. We got that covered for you!
gReactions – show comments for a post in Google Reader
By adamwulf on June 17, 2009
gReactions is a Firefox extension that allows you to read comments from all over the web to your posts, directly from Google Reader.