On Ad Networks: Pork Bellies, Diamonds, Or The New Direct Marketing?

imageimageOver the past few weeks, a debate over the use and growing prominence of ad networks and exchanges has been gathering. The recent shuttering of ESPN’s (NYSE: DIS) and the Washington Post’s (NYSE: WPO) respective ad nets, as well as the news that Forbes was starting another one, have given legs to a comment made at the Interactive Advertising Bureau’s annual conference by Martha Living Stewart Omnimedia’s Wenda Harris Millard (pictured, above, left) warning that media companies were selling web inventory like