When the Yahoo! and Microsoft Search Alliance is implemented, their new unified search marketplace will extend our reach to more than 150 million searchers in the U.S. and nearly 577 million searchers worldwide.
-RF
Regarding the Yahoo! and Microsoft Search Alliance
Webmaster Tools
It is imperative that any Search Engine Marketer use the following webmaster tools provided by Google, Yahoo! and Bing.
Google Webmaster Tools- Great for all its features except for determining how many backlinks are coming into your site
Yahoo! Site Explorer- Great for all its features and the best tool for determining how many backlinks are coming into your site
Bing Webmaster Central- Great for seeing your position and relevance on Bing
-REF
