The web application tracks peoples comments across a variety of services and aggregate them to one place. With Backtype, simple visit the site and subscribe to folk you find interesting.
They also recently added alerts which enable you to track and be notified when particular keywords are mentioned in comments across the web.
The full list of services they are able to tracks comments within are:
- Publishing Platforms: Blogger, LiveJournal, Movable Type, Posterous, TypePad, Vox, WordPress
- Comment Systems: Disqus, Intense Debate
- Aggregators: FriendFeed
- Answers: Mahalo Answers
- Social News: Digg, Hacker News, Reddit
To claim your comments, just visit the claim comments page and submit your FriendFeed username.