We knew it would come someday but I didn't think it would come so soon: MSN has begun incorporating BEHAVIORAL targeting features into its paid search program, adCenter.
There is no end in sight for what behavioral/Psychological targeting MSN, Yahoo, and Google might try next for Ad targeting.
http://publications.mediapost.com/index.cfm?fuseaction=Articles.san&s=47728&Nid=23067&p=380531