Looks like the internet search advertising wars are heating up. Microsoft is now kicking out Yahoo! ads on Microsoft Search pages in the US, France and SG.

At a conference with ad industry representatives at Microsoft HQ, the company, which has been steadily increasing the proportion of MSN ads supplied by AdCenter and reducing those powered by Yahoo! technology, also sought to woo advertisers by stressing its wider presence which now stretches from the PC and the web to video games consoles and mobile phones.

Microsoft and its Adcenter Targeting Advertising source