The Yahoo! Site Explorer team is planning tighter integration between Site Explorer and Bing Webmaster Center to make the transition as smooth as possible for webmasters. At this stage in the transition, it is important for webmasters to continue using Yahoo! Site Explorer to inform us about your website and its structure so you keep getting high quality traffic from searches originating on Yahoo! and our partner sites – even from markets outside the US and Canada that haven't yet transitioned to Microsoft systems. To keep things simple, we will share site information you provide on Site Explorer with Microsoft during this transition period.
When Microsoft fully powers the Yahoo! Search back-end globally, expected in 2012, it will be important for webmasters to use Bing Webmaster Center as well. The Bing tool will manage site, webpage and feed submissions. Yahoo! Site Explorer will shift to focus on new features for webmasters that provide richer analysis of the organic search traffic you get from the Yahoo! network and our partner sites..
let’s hope that Bing get a download button installed into Bing Webmaster tools before 2012