For those out there who like to use Yahoo’s Site Explorer to investigate the Yahoo index and mange their sites, the day you’ve been dreading has arrived. Yahoo have announced the final closure date for the service (after announcing earlier in the year that it would close “sometime this year”) and that day is tomorrow, Monday 21st November.  For managing your own sites, there’s always Bing or Google Webmaster tools but this obviously doesn’t give you the access to other sites on the web.  There are other services out there, like Majestic SEO or SEOmoz but you’re going to have to pay for these.