News.com officially announced support for TrackBank and Pingback links. Search engine optimizers are already excited by the prospect of “anyone linking to a CNET News.com story who sends the proper notification will get a link back in return” from the PageRank 8 site.
CNET is also referencing TrackBack and PingBack URLs as link relations in the page header. I like the TrackBack button for readers CNET uses for readers to look at other related sources.
I need to do some more reading on Pingback, still not sure what differentiates it from TrackBack.