Yahoo and MSn is now in alliance for SEO. It seems they have understood that they cant beat Google alone.
Oh! great Josefaryan, it is now clear that Yahoo! Search has merged Site Explorer into Bing Webmaster Tools actually. Thanks mate.
Yahoo and MSN have a common advertising platform which is Adcenter. They have joined together to complement each others' strengths so that they can provide users with the best experience.
I have heard about this topic before but don't understand why it occur? Is there any special advantage on there?
Absolutely! Google is the biggest search engine today. Search engines below Google are making kind of efforts to take lead, but this is not so simple.
I think this is all marketing. Search engines making efforts to take lead from Google! everyone want's to be on top.