Yahoo has announced yet another Yahoo Search index update. Yahoo notified us that we "may see some ranking changes and page shuffling in the index." But as of this morning, no SEO has noticed any significant changes with their rankings.
In fact, there isn't much discussion around the Yahoo Search engine at all, right now. We have a WebmasterWorld thread discussing the announcement, but all posts in that thread say no one noticed anything. We also have a Plurk thread where I asked if any one cares about the announcement, and the consensus is, no. No one cares.
The last Yahoo update was about a month ago, where the changes were very subtle to say the least. Yahoo typically conducts monthly search index updates and you can see all our coverage on those in the Yahoo SEO category at the Search Engine Roundtable.