There's a new quasi-standard in the world of HTML; the <a
rel="nofollow" href="...">...</a>. It is already or soon implemented in
Google, Yahoo, and MSN Search, as well as many different blogging
products. The intent? To battle comment, referrer, and trackback spam.
My comments on this are in my blog:
Rel Nofollow Details (Introduction)
http://blog.outer-court.com/archive/2005-01-19-n46.html
Nofollow in Firefox (User-stylesheets)
http://blog.outer-court.com/archive/2005-01-19-n34.html
Nofollow Just for Spam? (Semantics)
http://blog.outer-court.com/archive/2005-01-19-n32.html