Till now didn't heard anything like that. I doubt whether BING and yahoo will combine forces.

Can you provide the source from where you got the information.

I am heard about it ..basically microsoft and yahoo both are going for an agreement according to that paid result services for both search engine will be combined ...

"it is something like that you are able to select certain keywords for the PPC for both search engines simultaneously." This is my personal view... But did not heard anything regarding organic search results

i think it will remain a rumor. but if that will happen i think google will have a solution for that.

YPN should first open for global market.

there has been this rumour a year or two ago that MSN and Yahoo were going to merge. now you are saying they are planning to combine their forces. many webmasters would applaud them as it would save them some time spent on optimisation work as two would become one and they could pose a serious challange to google.

This is either really good for me, or really bad for me. Yahoo finds and recognizes a lot of my backlinks, but MSN doesn't recognize any. hmmmmm.....

The source was actually an article in the Wall Street Journal's digital section and in Ad Age. http://adage.com/digital/article?article_id=138177

Whatever they do, They better invent a new algorithm which is capable of giving more relevant SERPs. Unless and until that happens, Nothing can defeat Google in the search engines' field.

what i heard is another version of the story --microsoft and yahoo gonna have a big deal as the search engine field
yahoo gonna step back and it gonna be a flight b/w goole and bing