That's old news. There are a few alternatives out there. I do miss siteexplorer though. It's free, fast and good.
The service of Yahoo Site Explorer has been closed and this service is transferred to Microsoft Bing. Yahoo Site Explorer merged with Bing Webmaster Tools, which is similar to Google Webmaster Tools. For more about Yahoo Site Explorer or Bing Webmaster Tools you can go through the following link. http://www.ysearchblog.com/2011/07/08/site-exploror-7-8-11/
Yes, if you are missing anything in Yahoo than check to see if Bing has picked it up and moved it over or modified it in some way. Some changes started taking place back in November so if you are using certain services from either of those places then you are likely to keep seeing additional changes.
In fact not only old news, but I think they are shutting down many services due to the poor acceptation they had.
Actually Site Explorer was shut down because Yahoo no longer has it's own search engine (or spider). Yahoo's Slurp spider is more or less shut down (it still spiders some random things here and there that are unrelated to search). Even the URL they still give when it does hit something once in awhile still isn't there any longer. http://help.yahoo.com/help/us/ysearch/slurp Point being... you can't have a service like Site Explorer when you aren't exploring/spidering anything.
digitalpoint said it best. And ever since overture went down, yahoo for seo work has been miserable...Bing is picking up, but I can't believe I've been going to AOL...Yahoo's business model/plan is the most confusing thing I can think of. What is it? What is Yahoo?
Yahoo is down the drain... Bing relevancy is pretty bad. For the amount of traffic search engines (that aren't Google) send, it's barely even worth it to care. I've actually tossed around the idea of just blocking all spiders other than Google. For this site, search.com is the #2 referring search engine now... and no one is even remotely close to sending as much traffic as Google.
It has been closed for months.you can use this tool to so that. But they are little complicated. Not as good as Yahoo site explorer. http://www.opensiteexplorer.org/ http://www.backlinkwatch.com/index.php
I've got some official info from Yahoo! on this issue, check it out: Source: http://siteexplorer.search.yahoo.com/index.php