Most say that the recent news about Yahoo Site Explorer being shut down is expected. Some say the recent news came in anticipation of a Yahoo/Microsoft deal to promote and support the latest from the Bing Webmaster Tool-set.
When can you expect to see Yahoo Site Explorer Shut Down?
We are working with Microsoft to transition organic results in all markets to the Microsoft Search platform. Site Explorer will shut down once all markets are transitioned. This is expected later this year. We will keep updating you with progress of the transition at our Search Blog.
To learn more please visit http://www.ysearchblog.com/2011/07/08/site-exploror-7-8-11/.