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.
Bebo is the next generation social networking site where members can stay in touch with their College friends, connect with friends, share photos, discover new interests and just hang out.
Using RhNav - Rhizome Navigation I wrote a data aggregator for Technorati's API. The first result is a video which visualizes blog domains by analysing Technorati's Cosmos (the blogs which link to a particular URL). The video is a screencast of RhNav fetc
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.