Tracking what they're saying

In the Poynter's E-Media Tidbits column, Amy Gahran points to a new tool from Blogpulse called Conversation Tracker (sorry, link fixed now). This one is worth looking more at. You put in a topic or the URL of a story or posting, and Tracker shows you every other blog posting that linked to it. Gahran recommends it for news media to track the conversations around their stories. Seems it would be a great ego tool too.
As an example, here's the conversation on the 'overpaid White House staffers' story.
(It also might be a good tool for bloggers to see if a story's already been discussed. This posting had been commented on for a few days before I linked it...and my post isn't here.)