They did it..
It's changed..
It's a mix of google and Yahoo! directory..
http://help.yahoo.com/help/us/ysearch/ysearch-22.html
"What's changed with Yahoo! Search?
You may have noticed that the Yahoo! Search results look a little different.
As part of our ongoing efforts to offer you the easiest and most rewarding search experience, by default we now list results ranked by relevancy that combine web page matches from both third parties and the Yahoo! Directory.
Previously, by default we listed search results from the Yahoo! Directory and third-party search engine providers separately. Directory listings can still be viewed separately by clicking on the "Directory Site Matches" option in the navigation bar located below the search box.
Yahoo! Search returns comprehensive results that match the words you entered. The results are divided into four main sections:
Inside Yahoo!: Relevant products and services from within the Yahoo! network
Directory Category Matches: Relevant categories in the Yahoo! Directory
Sponsor Matches: Paid listings for commercial or product-related searches
Web Matches: Search results from third-party search engine providers, combined with listings from the Yahoo! Directory
Learn more about these sections...
We are committed to offering consumers and businesses the best possible search service on the Web. From time to time, we enhance Yahoo! Search and the Yahoo! Directory to help achieve our goal."