This is an article I read back in march which is very informative and brought me up to speed on some of Yahoo's major changes.
Yahoo! has announced it is dropping Google as its search engine and is going to crawl the web to provide its own search results. This is being cast as a competition and, of course, it is. It is also a crucial step in making the internet even more useful. If Yahoo! is ambitious, this may be the moment when the real power of the net is multiplied.
http://www.techcentralstation.com/032904E.html
Voo
http://www.vision32.com/Default.aspx