FriendFeed is a tool being used by scientists as a medium to discuss scientific research problems. FriendFeed allows users to set up what’s called a lifestream, aggregating stuff the user posts on the web.
What is Gabbr? Gabbr allows you to read and comment on the latest news across major news sources as well as the blogosphere. Bloggers can submit their blog posts to appear on the front page for others to comment on.