nofollow and dofollow is created by google, it more related to the PR Yahoo dont care whether it dofollow or nofollow, all of them is same for yahoo
just because one search engine came up with something doesn't mean other search engines won't/can't use it. nofollow was created because of blog spammers,to give no value to those links.spammers are doing so not to get pagerank. ;-) from yahoo. http://help.yahoo.com/l/us/yahoo/search/indexing/slurp-12.html
So does mean that yahoo views on no follow and do follow links are the same as google? I never thought they are considering the importance of page rankings as well.
Yahoo does not recognize nofollow and still follow every links they passed through, pass full link value although. That's why link showing by Yahoo Siteexplorere always much more than Google show links via link: operator.
Hey guys i have heard that yahoo is coming up with something very similar to do follow and no follow...any body knows anything??
Well, Yahoo Site Explorer shows even urls typed on the page and urls of your website in image. Google, (via link: operator) shows everything he wants to even website internal links sometimes
do follow links are going to get your popularity score up. no follow links will hurt your seo efforts in the long run.