Posted 16 May 2007 - 08:06 AM
I don't like the use of the nofollow value for internal links within a site. If a search engine uses "nofollow" in a link as a sign of distrust, then there's the potential to harm your site by using a rel="nofollow" within a link.
Besides, not all search engines use the nofollow value, and the ones that do are inconsistent in how they use it.
If possible, and you want to avoid duplicate content issues, could you set up the URLs so that if someone clicks on a cloud tag item, that those links could be easily disallowed in robots.txt? That's the approach that I would suggest.