Amit Agarwal has reported on a new version of Yahoo! called Yahoo! Alpha at http://au.alpha.yahoo.com. It has a minimalist home page, which has become de rigueur for search engines these days, and a single search box. The results page displays the usual list of web pages and on the right hand side you can opt to view results from Flickr, Yahoo Answers, YouTube, Yahoo News, Wikipedia and Sponsored links.
In the top right hand corner there is an option to Customise this page that enables you to remove one or more of the resources and to add your own.
I was initially intrigued by this but found it rather slow to respond and not as slick or responsive as Askx.com, which is testing out a similar approach to searching. Missing from both Askx and Yahoo Alpha is an obvious Advanced Search link. Both are in Beta and worth watching to see how they develop.