Bloomberg -- July 11 -- Social networking advertising will double in 2007 to $900 million, and will reach $2.5 billion by 2011. Overall display advertising will grow about 13%. "Every ad dollar MySpace and Facebook take is a dollar that in the past would have gone to Yahoo," an analyst at the Munder Fund told Bloomberg. Yahoo!'s shares trade at 5.5x sales. Google's go at 14.1x If management tries just to be more efficient, its shares could dip below the $23 where they traded last October. FULL ARTICLE @ 24/7 WALL STREET