The Internet Advertising Board has a story on rumors of a M&A between Yahoo and Microsoft. I would never have thought that would happen in a million years, but considering Yahoo’s performance lately, it sounds like it would ad value to shareholders.

Rumors has it that Microsoft is putting together a $50 Billion bid for Yahoo, the number two player in the Internet advertising space. Besides making a lot of Yahoo investors richer, this may have great impact on the landscape of online ads. An MSN-Yahoo combined market share would reach 38.4 percent, but still trail behind Google’s strong 48.3% market dominance.

It certainly would give Microsoft that extra reach it has been trying to develop, and balance out the all-mighty Google.