Fox News has entered the world of advertising synergy with Fox Fusion, a new initiative that allows clients to purchase ads across multiple platforms. Buyers will be able to purchase ads on the cable news channel and the new Fox Business News, as well as The Wall Street Journal, WSJ.com and other News Corp.-owned websites.

Fox Fusion will not include any of the Fox Interactive Media (FIM) websites, such as MySpace, FoxSports.com and AmericanIdol.com, but will include all the news divisions, including mobile.

FIM, which is in something of a turnaround after the departure of CRO Michael Barrett, will sell its inventory through the newly launched Fox Interactive Media Audience Network.

Experts predict the move will lead viewers from the Fox News website to WSJ.com, and vice versa. FoxNews.com draws 8.5 million viewers a month, significantly trailing CNN.com, which saw 37 million visitors in February, according to Nielsen Online data.

Early last year, Fox Entertainment Group launched Fox One, a similar cross-media marketing unit.