Yahoo Search announced today that it is supporting the NOYDIR meta tag, which will allow webmasters full control over the title and description of their sites. Currently, if a site is included in the Yahoo Directory, Yahoo Search will always display the title and description stored in the Yahoo Directory, which may be out of sync with what the site has currently.
It will be interesting to see how much effect this change has on the rankigns of the sites currently in the Yahoo Directory. My initial guess is that most site might see a slight enhancement in their rankings because the title and description Yahoo uses should now be more relevant.
[Updated on March 1, 2007] One day after including the “NOYDIR” meta tag, I found that the title and description of my sites have changed, although it has little impact on the rankings.