Hi Today only I read about Link attribute called canonical released by Google to specify duplicate content on your site to Googlebots. You can read more about this link attribute on the below url and can use it on your site code. http://www.google.com/support/webmasters/bin/answer.py?hl=en&answer=139394
Nice info, however a very tricky thing to add the tag to multiple pages as in case of directory owners when same site could get listed in search results by virtue of different keywords... Not sure if this is really such a great idea and if live.com or yahoo too would give similar treatment to the tag. Would it be appropriate for Google to launch a new tag like this, and does it have buy in from all other search engines is a big question that remains unanswered. Thanks for sharing the info though Cheers G