Editor's note: The MediaPost story on which this news item was originally based was apparently incorrect; the behavioral targeting being offered by MSN is not yet via adCenter, and behavioral targeting is available only for display ads, not paid search. For an updated version, see ClickZ's story.

As of Tuesday, advertisers have the capability of showing their display ads to users based on their web-surfing history, reports MediaPost. Microsoft's MSN unit will study surfers' search behavior to deduce their interests and categorize them among 18 audience segments, including mobile users, internet power users, gamers, movie watchers, new/expecting moms, parents, and various categories related to travel searchers and auto buyers.