William Loughner writes \"Bloggers have discovered citation indexing, though they call it \"trackback.\" When a blogger references another blogger, they can \"ping\" to let that blogger they\'ve been referenced. The citee can then list the citer.
Movabletype Started it, and you can learn more Here.
The new blog of the Pepys Diary gives a good example of this in action.\"
Mefi does it as well [Did they stop?], and