Source: http://www.labnol.org/internet/blogging/watch-buzz-around-topics-with-spy/3935/
If you use blogs, FriendFeed or Twitter to monitor buzz around your favorite topics (say iPhone launch) - do check out Spy.
Spy looks for conversations happening on Twitter and FriendFeed around any search topic and presents them in an auto-refreshing vertical timeline.
To get an idea, check the following time-lapse video of Spy that captures iPhone related conversations.
Related: Techmeme Time Lapse Video
Watch Buzz Around any Topic in Real Time with Spy - Digital Inspiration by Amit Agarwal