<A HREF="http://money.cnn.com/2006/12/05/technology/bc.yahoo.reorganization.reut/index.htm">Yahoo announced a reorganization</A> Tuesday that marks Chief Financial Officer Susan Decker as a likely successor to the CEO and simplifies its structure as it battles faster-growing rival Google. Decker will take the lead of a new unit focused on advertising, which is Yahoo's main source of income but has also seen growth slow in some areas. Media, communication and other product groups will be merged into a unit focused on user activities.